Concentration Essays & Research Papers

Best Concentration Essays

  • Measures of Concentration - 698 Words
    Measures of Concentration Monopoly Market Power • “It is a ability of firm to set the price of a good or service without risking the loss of its entire market share” • Price taker and Price maker • Examples: Indian Railways Sources of Market Power  Lack of rival firms  Customer Preference  Location  Product differentiation What is Measures of concentration?  “In economics, market concentration is a function of numbers of firms and their respective shares of...
    698 Words | 6 Pages
  • Concentration and Ml - 266 Words
     Acid –Base Titration: A volume of 128 mL of 0.650 M Ba(OH)2 was required to completely neutralize 50.0 mL of nitric acid solution (HNO3). What is the concentration of the acid solution? Gravimetric Titration: Calculate the molar concentration of Ba2+ ions in a 500.0 mL sample of an unknown aqueous solution if 2.47 g BaSO4 is formed upon the addition of excess Na2SO4? Stoichiometry of Acid –Base Reactions: What volume of 0.800 M HCl is required to completely neutralize 35.0 g of...
    266 Words | 2 Pages
  • Osmosis: Concentration - 642 Words
    OSMOSIS and TONICITY IN POTATO STRIPS The purpose of this experiment was to make observations and conclusions about the ability of cells to adjust to varying chemical concentrations in the environment and to observe the effect of isotonic, hypotonic and hypertonic solutions on cells. Hypothesis If a solution is Hypotonic, then water will move from the beaker into the potato because water outside the cell will be in higher concentration than water inside the cell. If a solution is...
    642 Words | 2 Pages
  • Concentration and Exposure Ans - 724 Words
    1. The label CORROSIVE on a chemical container indicates Ans : ( b ) that contact destroys living tissue as well as equipment 2. FLAMMABLE means Ans : ( a ) easily ignited and capable of burning rapidly 3. " Fatal if swallowed " indicates Ans : ( c ) that the substance will cause death if ingested 4. What is the correct way to handle the following situation? Briefly explain. a. Chemical : Acetic asid i. Inhalation exposure Ans : Remove the person from the exposure. Begin rescue...
    724 Words | 3 Pages
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  • Determining Concentration of a solution Lab
    Determining the Concentration of a Solution: Beer’s Law Purpose: The purpose of the experiment is to determine the concentration and formula of an unknown cobalt nitrate solution by measuring absorbance. Introduction: A Colorimeter will be used to determine the concentration and formula of an unknown cobalt nitrate solution. The colorimeter sends blue light from the LED light source to pass through the solution and hit a photocell. A solution with a higher concentration will absorb...
    569 Words | 4 Pages
  • The Effects of Concentration on Osmosis - 1446 Words
    Introduction: This experiment was used to examine the hypothesis that: Osmosis is dependent on the concentrations of the substances involved. Diffusion is the passage of solute molecules from an area of high concentration to an area of low concentration (Campbell & Reece, 2005). An example is ammonia diffusing throughout a room. A solute is one of two components in a chemical solution. The solute is the substance dissolved in the solution. The solvent, the other component, is any liquid...
    1,446 Words | 6 Pages
  • Solute Concentration of Potatoes - 898 Words
    Nov 19/12 Solute Concentration of Potatoes Block 2-2 Purpose: To determine the concentration of solute in the potato’s cytoplasm by measuring the change in mass after the process of osmosis. Materials and Equipment: Refer to Biology 12 Lab Manual – Investigation 13 Procedure: Refer to Biology 12 Lab Manual – Investigation 13 Data and Observations: The Potatoes change in mass after the process of Osmosis Test Tube # |...
    898 Words | 3 Pages
  • Mole and Molar Concentration - 920 Words
    Chapter 3 Important Chemical Concepts: Expressing Quantities and Concetrations I. Important Units of Measurement A. SI Units (International System of Units) SI Base Units Physical Quantity Name of Unit Abbreviation Mass kilogram kg Length meter m Time second s Temperature kelvin K Amount of substance mole mol Electric Current ampere A Luminous Intensity candela cd Prefixes for Units giga- G 109 mega- M 106 kilo- k 103...
    920 Words | 6 Pages
  • Osmosis and Solute Concentration - 311 Words
    Introduction Cells have kinetic energy, a source of energy stored in cells. This energy causes molecules to bump into each other and move in new directions. Diffusion is one result of this molecular movement. Diffusion is the random movement of molecules from an area of higher concentration to areas of lower concentration. Osmosis is a special kind of diffusion where water moves through a selectively permeable membrane that only allows certain molecules to diffuse though (Lab...
    311 Words | 1 Page
  • Osmosis: Concentration and Potato Strips
    Controlled Assessment: Osmosis of a Potato [pic] Osmosis: Osmosis is the movement of substances through a partially/semi permeable membrane from an area of high concentration to an area of low concentration to balance of the concentration of the two sides. Biological membranes do allow water to pass through, but water will have no net movement unless osmosis takes place. Preliminary Method I have chosen to investigate the factor of the weight of potato strips after set amounts of...
    1,194 Words | 6 Pages
  • Solution and Concentration in Chemistry - 2044 Words
    SOLUTION AND CONCENTRATION A solution is a homogeneous mixture, made up of a solute dissolved in a solvent. Ex. In a water (aqueous) solution of sodium chloride, the sodium chloride is the solute and the water is the solvent. Solute – the component that is dissolved or is the least abundant component in the solution. Ex. Sugar, salt Solvent – the dissolving agent or the most abundant component in the solution. Ex. Water Common Types of Solution State of Solution State of...
    2,044 Words | 8 Pages
  • Determining the glucose concentration in Sprite
    Name: Raj Bose Date: 23/1/2015 Partners: Sunniva & Bayu Determining the concentration of glucose of 7UP Glucose solutions prepared as follows:- In each case 250.0 cm3 volumetric flasks used Concentration (%) Mass/g 4.00 10.00 8.00 20.00 12.0 30.00 16.0 40.00 20.0 50.00 Table: 1- Recording of concentration, volume, and qualitative observations of various solute/solvent/solution used during the experiment. Name Concentration (%) Volume (ml) Qualitative Observations Glucose (C6H12O6) 5 different...
    954 Words | 7 Pages
  • Osmolarity: Concentration and Sucrose Solutions
    Estimating Osmolarity by Change in Weight By: Sondus Kahil 27 February 2012 TA- Ashley Hintz Biology 200A-section 002 Abstract: My group and I conducted the experiment that estimates osmolarity by change in weight of potato tubers, this was conducted in order to explore the process of diffusion and osmosis and more importantly to investigate the question of “Does different concentrations of sucrose solutions have an effect on the final weight for the...
    2,118 Words | 6 Pages
  • Osmosis: Concentration and Potato Tissue
    Unit 4 Lab – Effects of Osmosis on Living Tissue Assignment Total: 35 Points Course Weight: 6 Pre-Lab Preparation - Review the following resources to complete this assignment: Textbook: Chapter 5, pg. 83-86 Mastering Biology / Study Area / Chapter 05 – The Working Cell / Student Home Key Concepts Video: Plasmolysis Video: Turgid Elodea Activity: Membrane Structure Activity: Diffusion Activity: Osmosis and Water Balance in Cells Bioflix: Membrane Transport Additional Resources Blast Animation:...
    1,638 Words | 7 Pages
  • Spectrophotometer: Concentration and Standard Curve
    Lab Report 4 Biology 103 Prof. Dr. Johnson Spectrophotometer; the finding of protein concentration of an unknown sample of BSA, and by using the standard curve. Abstract A spectrophotometer’s purpose is to use colors of the light spectrum to determine the concentration of light absorbing molecules in a solution. (p.59) In this particular lab, our mission was to determine the protein concentration and the standard curve of the unknown sample of BSA. This, by preparing five dilutions...
    789 Words | 3 Pages
  • effect of concentration on rate of reaction
    Stephanie Chun March 5, 2010 2213-020 Internal Assessment – Investigating the relationship between concentration of reactants and rate of reaction using hydrochloric acid and magnesium strip Research Question To study the effect of manipulating the concentration of hydrochloric acid on the rate of hydrogen gas production during the reaction with magnesium, using the pressure buildup by hydrogen gas. Introduction Concentration and surface area of reactant, temperature, and catalyst...
    1,519 Words | 16 Pages
  • Concentration, Solution, Density - 684 Words
    Abstract This laboratory involved utilizing equipment to dilute a sugar water solution. It also created solutions containing varying levels of concentrations and densities. Equations were used to figure the molecular weight of the sugar, and the number of moles of sugar in the volumetric flask. There was also an equation to figure the Molarity, as well. As a result of the experiment, I now have a better understanding of the density of a concentration, and what Molarity is . Observations...
    684 Words | 3 Pages
  • Rate of Osmosis - Concentration - 436 Words
    Rate of Osmosis Investigation Lab Title: A simple heading referring to your investigation Abstract: Write this section last! It is a brief paragraph or 2 which outlines the purpose, the method, the pattern of results and the conclusion you reached. It is an overall snapshot of the whole investigation. Introduction: Purpose: Biological Background: All living organisms are made of cells which are surrounded by a membrane. The cell membrane has many functions but...
    436 Words | 2 Pages
  • Determination of Concentration of Potassium Hydroxide
    Determination of Concentration of Potassium Hydroxide Weigh boat 0.87g Weigh boat + Sulphamic acid 3.29g Weigh boat after transfer 0.87g Sulphamic acid 2.42g | Trial | 1st | 2nd | 3rd | 4th | 5th | Start | 3.00 | 3.20 | 5.20 | 18.55 | 1.90 | 14.65 | Finish | 17.35 | 18.10 | 18.10 | 31.50 | 14.65 | 27.65 | Titre | 14.35 | 14.90 | 14.90 | 12.95 | 12.75 | 13.00 | Average titre = 12.90cm3 NH2SO3H + KOH – NH2SO3K + H20 Sulphamic Acid Standard Solution Moles from...
    267 Words | 2 Pages
  • Osmosis and Salt Concentration - 2086 Words
    Osmosis in Plant Cells Sara Braqi March 25, 2012 Biology I Research Question Which saltwater concentration will have the most damaging effects on potato cells? Introduction Osmosis is the diffusion of water across a selectively permeable membrane. Generally, water moves from a lower solute concentration into a higher solute concentration. This movement of water occurs due to the need for the concentrations in the cell and in the solution to be at equilibrium. A solution with a low...
    2,086 Words | 7 Pages
  • Osmosis: Concentration and Water - 1342 Words
    Osmosis Lab: Potatoes and Elodea Background Information: Cells have a need to regulate their internal environment. They need to be able to this because cells often find themselves in environments where the concentration of dissolved solids outside the cell is different from the number of dissolved solids inside the cell. Since the solids can not move across the membrane, the cell responds by moving water either into or out of the cell in an attempt to balance the number dissolved...
    1,342 Words | 5 Pages
  • Osmosis in Different Concentrations - 2433 Words
    I am going to investigate osmosis when potato is placed in different concentrations of sucrose. I am aiming to witness osmosis in 5 different concentrations of sucrose. I will use 5 varying concentrations so that I have a wider spread to compare the results, and check that I don’t have any anomalies Prediction Osmosis is the process of diffusion of water molecules from a weaker solution into a stronger solution, through a semi permeable membrane. The tiny pores in the...
    2,433 Words | 10 Pages
  • Determination of Critical Micelle Concentration
    | Determination of the Critical Micelle Concentration | | | | Introduction: Purpose: The purpose of this experiment is to use the Conductometric method to determine the critical micelle concentration of SDS. Materials and Equipment: * SDS- Sigma Aldrich, Lot: 38H0080, S/N: L-439, * NaCl- Food grade Great Value * SDS 20% solution- Fisher Biotech, S/N: BP1311-200, Lot: 468059 * Wave generator- Pasco Scientific, S/N PI-9587C * Ammeter- Keithley...
    1,830 Words | 6 Pages
  • Osmosis and Highest Water Concentration
    Osmosis Osmosis is just a special case of diffusion - where water diffuses through a membrane which has different concentrations on either side. Permeable means "allows anything to pass through". Membranes in cells allow small molecules (water) to pass through, but prevent bigger ones from passing. This is called "selectively permeable". Take a look at the following animation; If a selectively permeable membrane separates the two solutions, water moves through it in both directions...
    330 Words | 2 Pages
  • Osmosis: Various Sucrose Concentrations
    Abstract: Osmosis is the transport of water across a selectively permeable membrane from a region of a higher water chemical potential to a region of lower water chemical potential. (Tzahi 2006) To demonstrate osmosis lab, artificial cells were made with various sucrose concentrations and were placed into beakers of different sucrose solutions. Overall the results showed that the higher percentage of concentration gradient of sucrose, the more the artificial cells absorbed. Introduction:...
    617 Words | 2 Pages
  • Sedimentation: Tangent and Concentration - 5154 Words
    SEDIMENTATION ABSTRACT Sedimentation is the process of separating a liquid mixture of suspended particles into clear supernatant liquid and denser slurry having a higher concentration of solids. This is usually accomplished by allowing the particles to settle through the force of gravity, mechanically using centrifugal force, or electrostatically using an electric current. Continuous sedimentation tanks are usually used in wastewater treatment facilities to separate suspended particles from...
    5,154 Words | 68 Pages
  • The Effect of Salt Concentration on Osmosis in Potato
    Part A: Title: Diffusion Diffusion is the spontaneous movement of particles from where they are more concentrated to where they are less concentrated. For this experiment, a 14 cm glass was filled with cold tap water. A drop of red food coloring was dropped in the cup. A stopwatch was used to measure the time it took for the food coloring to get to the bottom of the cup. The average diffusion rate was .78 cm a second. If a different color was used, I do not think it would have made a...
    1,173 Words | 4 Pages
  • Determining the Concentrations of Red Dye in Sodas
    Austin Dunn January 13, 2013 Determining the Concentrations of Red Dye in Sodas Abstract The use of red dye #40 is common in various soft drinks today. The labels on these beverages do not specify how much dye we are consuming. We did this experiment to find out which soda uses the most dye. Using a spectrophotometer, we measured how much light is absorbed by various known concentrations of red dye. After collecting this data, a standard curve was made that correlated the concentration of...
    342 Words | 1 Page
  • Determination of Copper(Ii) Concentration by Spectrophotometry
    QUANTITATIVE DETERMINATION OF COPPER (II) CONCENTRATION BY SPECTROPHOTOMETRY D.DEL PRADO1, J. BELANO1, M.MAHUSAY2,and M.FRANCISCO2 1 DEPARTMENT OF FOOD SCIENCE AND NUTRITION, COLLEGE OF HOME ECONOMICS 2INSTITUTE OF CHEMISTRY, COLLEGE OF SCIENCE UNIVERSITY OF THE PHLIPPINES, DILIMAN, QUEZON CITY 1101, PHILIPPINES DATE SUBMITTED: 12 MARCH 2013 DATE PERFORMED: 7 MARCH 2013 ------------------------------------------------- ------------------------------------------------- ABSTRACT...
    2,691 Words | 9 Pages
  • The Effect of Solute Concentration on Osmosis in Potatoes.
    Martina Oganesyan Title of investigation: The effect of solute concentration on osmosis in potatoes. Research question: What is the solute concentration of a potato? Hypothesis: Osmosis is the movement of water across the membrane from an area of high concentration to an area of low concentration. The osmosis continues until the solute concentrations are equal in both areas. In this experiment, we put pieces of potatoes into test tubes with sugar solutions of different concentrations and...
    943 Words | 3 Pages
  • solution colour and ion concentration investigation
    Investigation - Solution Colour and Ion Concentration Aim: To investigate whether solution colour can be used to reliably determine the concentration of coloured ions in a solution. Hypothesis: the concentration of permanganate ions in the solution is inversely proportional to the percentage transmission of light through the solution. Dependent variable: concentration of permanganate ions. Independent variable: percentage transmission of light through the solution. Equipment: 20...
    653 Words | 4 Pages
  • Concentration Of Production Of Critical Row Materials
    Concentration of Production of Critical Row Materials At home I read a text about the Herfindahl-Hirschman Index (HHI). It’s characterized as the sum of the squares of the part of market share adjusted by the 50 the largest entities producing a specific product. Also I knew that index lower limit is zero, so if 50 countries produce a particular product and they has the same market share, the index would be 0.02. Besides, in this text I knew about “moderately concentrated” and “highly...
    366 Words | 2 Pages
  • How the Concentration Affects the Rate of the Reaction
    Title Page Number Diagram of Apparatus Introduction Risk Assessment ` Table of Results Line of Best Fit Graph Error Bars Graph Gradients Graph Analysis • Error Bars Analysis Evaluation • Improvement Assessment • Improved Experiment. • Reliability References Introduction: For this data analysis project, I...
    2,031 Words | 7 Pages
  • Determination of Concentration Using the Spectronic 20
    Abstract: The purpose of this experiment was to determine the concentration of an unknown amount of copper sulfate using the spectronic 20. Four solutions of different concentrations of H₂O and CuSO₄ were put into the spectronic 20 to observe their absorption of light. Then, a graph was created to plot down the measurements. Using the calibration curve of the graph, the concentration of the unknown substance was found out to be .12M. Background/Introduction: Beer’s law (which states...
    476 Words | 2 Pages
  • Quantitative Determination of Protein concentration using the biuret test
    Winny Stephanie Experiment 1: Quantitative Determination of Protein Concentration Using the Biuret Test Table 1: Experimental protocol for construction of the protein standard curve Tube 1 2 3 4 5 6 Buffer (ml) 1.0 0.8 0.6 0.4 0.2 0.0 BSA Protein solution (10 mg ml-1) (ml) 0.0 0.2 0.4 0.6 0.8 1.0 Biuret reagent (ml) 4.0 4.0 4.0 4.0 4.0 4.0 Total Volume (ml) 5.0 5.0 5.0 5.0 5.0 5.0 Final protein concentration (mg ml-1) 0 2 4 6 8 10 Absorbance 0.000 0.092 0.163 0.272 0.363 0.474...
    639 Words | 5 Pages
  • Practical Report: Determination of Concentration Using a Standard Curve
    1 Practical report: Determination of concentration using a standard curve Introduction Spectrophotometer is an instrument that confirms the measurement of specified wavelength of light that passes through medium. The measurement of light absorbance by a solution is also done with spectrophometer. Absorption spectrum Spectrometers are mainly and widely functional in identifying the components of solutions that helps determine the components’ concentrations. Compounds are experimentally...
    735 Words | 5 Pages
  • Lab Report: Relationship between Concentration and Absorbance
    involves measuring the absorbance of several concentrations of the pure substance or the "standard" substance determine relationship between concentration and absorbance compared results from unknowns How to use Linear Regression for Generating a Standard Curve? © 2010 by M. Olaveson UTSC 2 BIO A01F-Fall 2010 - ASSIGNMENT # 2 - Preparing a Standard Curve using Excel 2007 Assignment # 2 Analysis of Data from Lab 2-Exercise 2 Table 2.6. Protein in Test Tubes prepared...
    534 Words | 3 Pages
  • Effect of Solute Concentration on Osmosis in Potato Cells Report
    INTRODUCTION Osmosis is the movement of water molecules from high concentration to low concentration through semipermeable membranes, caused by the difference in concentrations on the two sides of a membrane (Rbowen, L.). It occurs in both animals and plants cells. In human bodies, the process of osmosis is primarily found in the kidneys, in the glomerulus. In plants, osmosis is carried out everywhere within the cells of the plant (World Book, 1997). This can be shown by an experiment with...
    1,701 Words | 5 Pages
  • Effect of Different Concentrations of Salt on Potato Cell Mass
     Aim To investigate the effects of increasing salinity on potato cell mass. Background Information This experiment is based upon osmosis. Osmosis can be defined as the net movement of water molecules from a region with high concentration to a region with low concentration. This movement must take place across a partially permeable membrane such as a cell wall, which lets smaller molecules such as water through but does not allow bigger molecules to...
    1,477 Words | 7 Pages
  • Osmosis lab/ concentrations of solutions effect on potatoes mass.
    "Do different concentrations of solutions determine the mass of a potato?" Introduction: The way to get the full results of this lab was through the process of osmosis. Osmosis is the movement of water across a membrane into a more concentrated solution to reach an equilibrium. When regarding cells osmosis has three different terms that are used to describe their concentration. The first of these words is isotonic. Cells in an isotonic solution show that the water has no net movement and the...
    1,415 Words | 5 Pages
  • Investigating the Concentration of the Solutions Inside the Vacuole of a Potato Cell.
    Osmosis Investigation We are trying to find out what the concentration of the solutions is inside the vacuole of a potato cell. We will investigate how the mass of the potato chips change in different sucrose solution concentrations. We will use osmosis to do this. I will be measuring and controlling many different variables, these include; - The dependent Variable – Weight of potato chip Independent Variable – Concentration of sucrose Control Variables consist of; - 1....
    1,492 Words | 6 Pages
  • Effect of Concentration on Enzyme Activity Lab Report
    Lab Report (Effect of concentration on enzyme activity) Biology Noor Alawadhi 11- KC Introduction: An Enzyme is a protein, which is capable of starting a chemical reaction, which involves the formation or breakage of chemical bonds. A substrate is the surface or material on or from which an organism lives, grows, or obtains its nourishment. In this case it is hydrogen peroxide. This lab report will be explaining the experiment held to understand the effects of the changes in the amount...
    619 Words | 3 Pages
  • Experiment to Shoew the Effect of Different Concentration of Glucose on Potato Strips
    EXPERIMENT TO SHOW THE EFFECT OF DIFFERENT CONCENTRATION OF GLUCOSE ON POTATO STRIPS INTRODUCTION: Molecules of liquid and gas are constantly in motion, they move randomly in all directions and bounce around in all directions and bounce around and into each other. As they move, they tend to spread out moving from areas with many molecules to areas with fewer molecules . This process of spreading out is called Diffusion, for example smell of cooking travelling around the house from the...
    1,248 Words | 5 Pages
  • Marble chip investigation - rates of reaction, studying the effects of change in concentration of the acid
    Marble Chip Investigation Method 1.Set up the equipment as diagram shows. The measuring cylinder must be filled with water and then inverted into the tub. 2.Measure the quantity of hydrochloric acid and marble chips to the decided amount. Add water to the acid to change the concentration to what you need. 3.Take note of the amount of water in the measuring cylinder. 4.Put the marble chips and hydrochloric acid into the conical flask. Replace the bung and start the stopwatch. 5.Once the...
    1,754 Words | 8 Pages
  • Affect of Concentration of Enzymes on Rate of Break Down of Egg White
    Enzyme concentrations Hypothesis The higher the concentration of protease enzyme the higher the rate of breakdown of the egg white. This is because egg white is mainly formed of collagen, which is a protein, which is what the enzyme protease breaks down. The more enzyme there is the more enzyme substrate complexes are formed which break down peptide links between the monomers of the protein accelerating the amount of protein broken down in a space of time. How the results will be...
    1,327 Words | 5 Pages
  • To investigate the effect to the potato cells in the different solute concentration water
    Aim: To investigate the effect to the potato cells in the different solute concentration water Introduction; Water can move through the different cells due to the difference of water potentials in the cells. If there is a higher solute concentration in the cell than outside the cell, the water will move into the cell. However, if the concentration of inside the cell is lower than the outside, water will not move into the cell. This process is called osmosis. Research question; This...
    1,068 Words | 6 Pages
  • Osmosis and Diffusion on Different Concentrations of Sodium Chloride on a de-Shelled Chicken
    1. Provide the aim and background information 2.1. Diffusion is the spontaneous kinetic movement by which molecules move from an area of a high concentration to an area of low concentration. Diffusion continues until it reaches equilibrium. Osmosis is similar to Diffusion but it’s the process in which water moves across a semi-permeable membrane and goes to the higher concentration of solute.1 2.2. Important factors to Osmosis and Diffusion include Temperature, Concentration...
    1,540 Words | 5 Pages
  • How Different Concentrations of Glucose Effects Osmosis in Potato Cells
    My group and I are carrying out an investigation to find out how different concentrations of glucose affect osmosis in potato cells. Osmosis is the passive process of diffusing water which means within this experiment particles of water will move from a lower concentrated area to an area of higher concentration ; in this case it will be a concentration of glucose. Diffusion is when particles move from an area of high concentration to low concentration ; for example when a smell of cooking...
    797 Words | 2 Pages
  • Determining the Solute Concentration of a Potato, Gcse Ocr 21st Century Biology Coursework
    Determining the Solute Concentration of a Potato Aim: In this investigation I am going to work out the sugar concentration of a potato. I aim to find this out by putting potato cores into various concentrations, measuring the mass before and after. Due to osmosis the potato cores will change in mass to make the concentrations at an isotonic level, helping us to work out the mass of the potato. I predict that potato in the weaker solutions will gain mass, because some water will be absorbed by...
    2,369 Words | 7 Pages
  • To compare the concentration of vitamin C in different brands of orange juice.
    Practical Task: To compare the concentration of vitamin C in different brands of orange juice. Juice sample provided: 0.1% vitamin C solution, fresh orange juice, You C 1000 orange water. Aim of investigation: To compare and verify the amount of vitamin C in Mr. Juicy and You C 1000 orange juice. Introduction: Problem: To compare the concentration of vitamin C Hypothesis: Concentration of vitamin C in Mr. Juicy is about 0.02 % Concentration of vitamin C in You C 1000 orange...
    582 Words | 3 Pages
  • "Experiment to investigate the effect of osmosis in potatoes" A GCSE experiment looking at the effects of the concentration of sucrose solution on osmosis in potato tubers.
    Experiment to Investigate Osmosis in Potatoes The aim of this experiment is to investigate the movement of water in and out of plant cells. The cells chosen for study will be taken from potato tubers. Firstly I will explain what osmosis is. Osmosis is the passage of water from a region of high water concentration through a semi permeable membrane to a region of low water concentration. This definition contains three important statements: a) It is the passage of water through a semi permeable...
    2,789 Words | 10 Pages
  • Determination of Zinc and Nickel Concentration by (1) Ion-Exchange Chromatography Followed by Chelometric Titration, and by (2) Atomic Absorption Spectroscopy of the Mixture
    DETERMINATION OF ZINC AND NICKEL CONCENTRATION BY (1) ION-EXCHANGE CHROMATOGRAPHY FOLLOWED BY CHELOMETRIC TITRATION, AND BY (2) ATOMIC ABSORPTION SPECTROSCOPY OF THE MIXTURE Experiment 4 Dates of Experiment: 10/14/08 through 10/30/08 Date of Report: 11/7/08 Chem 2262L � I. Introduction In this experiment, the zinc and nickel contents of unknowns were tested using two methods. In the first method, nickel and zinc were separated through ion-exchange chromatography and analyzed through...
    1,332 Words | 11 Pages
  • Beer's Law Lab - 1146 Words
    Objective: The purpose of this lab is to demonstrate that there is a linear relationship between the number of molecules that can absorb light present in a solution and the amount of light absorbed by a solution. This lab should prove that Beer’s law and the equation A=a x b x c, is a linear relationship. Procedure: The only deviations in the lab procedure was that the stock solution was made before arrival to the lab with 0.570 g of KMnO4...
    1,146 Words | 6 Pages
  • vugj - 460 Words
    Introduction: Osmosis is the diffusion of water from a higher concentration to a lower one through a semi-permeable membrane and occurs in the cells of organisms. It is affected by the addition of solute which would lower the water potential, making water potential and solute concentration inversely related. The concept of osmosis loosely described is that the presence of more solute outside the cell means the presence of less solvent (or water molecules in this case) and vice versa; the goal...
    460 Words | 2 Pages
  • Osmosis in Potato Course Work
    What affect does concentration of solution have on potato tissue? In my preliminary investigation, I will be controlling the following variables: • length of potato cylinder; • amount of solution / water; • type of potato; • size of potato; • temperature of water; • same ruler / person. Changing the concentration of solution: Using three glass test tubes, I will set up the following configuration: • Test tube 1 - Distilled water; • Test tube 2 - 5% salt solution; • Test...
    2,084 Words | 8 Pages
  • Freezing Point Lab - 953 Words
    Purpose: The purpose of this lab was to determine the freezing point of pure water, the experimental van’t Hoff factor for a substance and the molar mass of an unknown solution. Reagents: 25mL deionized Water ¼ to ½ inches of rock salt 25mL Sodium Nitrate (NaNO3 ) 25mL unknown solution – handle unknown solution carefully Procedure: For part 1, the freezing point of deionized water was determined. An ice bath was prepared by filling a 600mL beaker ¾ full of ice and covered with ¼...
    953 Words | 3 Pages
  • Osmosis Start - 427 Words
    Investigate osmosis between potato tissue and sugar solutions. Aim: To investigate the effect of varying concentration of a certain sugar solution on the amount of osmotic activity between the solution and a potato core of a given size 10mm Hypothesis: Osmosis is defined as the net movement of water or any other solutions molecules from a region in which they are highly concentrated to a region in which they are less concentrated. This movement must take place across a partially permeable...
    427 Words | 2 Pages
  • Determing the Osmolarity of a Potato - 1402 Words
    Determining the Osmolarity of a Potato Mishal Hasan Abstract Students in Biology find it difficult to understand the concept of tonicity and osmolarity in a real time situation. In this investigation, several concentrations of sucrose were used to determine the osmolarity of a potato. It was found that the concentration of sucrose was close to 3.6 in the potato used showing that it was isotonic. Anything above caused the potato to gain weight showing that it was a hypotonic solution and anything...
    1,402 Words | 5 Pages
  • Beers law - 480 Words
    Determining the Concentration of a solution: Beer's Law Objective In this lab of Determining the concentration of a unknown solution: Beers Law. We determined the concentration of a unknown CuSO4 solution by measuring its absorbance with the colorimeter. With all the calculations we were able to solve the linear regression Equation of absorbance vs. concentration and the alternate method. Materials Vernier LabPro or CBL 2 interface .40 M CuSO4 solution Computer or handheld...
    480 Words | 4 Pages
  • Osmosis in Potatoes - 1324 Words
    How is Osmosis Affected By the Concentration PLANNING Independent Variable The independent variable in this experiment is the thing that I will be changing in the experiment. This is the range of concentrations that have been obtained by diluting the original 1M solution of Sucrose. This is therefore the only thing that is going to be altered as I am investigating how different percentage of water molecules affects the weight of the the potato thus the rate and direction of osmosis....
    1,324 Words | 4 Pages
  • Osmosis Beetroot Experiment - 356 Words
    From the results obtained and the bar graph plotted, it could be seen that when there was a high concentration of sugar the mass of beetroot decreased. This happened because water moved from the inside of the beetroot, where there was a high water potential into the sugar solution, which had a lower water potential. In the other four beakers where the concentration of sugar solution was less, the mass of the beetroot increased. This happened because water moved from the dilute sugar solution...
    356 Words | 1 Page
  • Macroscopic Nutrient's Effects on Tomato Plants
    [Type the company address] [Type the company address] Chemistry Hydroponics EEI Cody Yakimoff Year 11 – Mrs Bev Gallus Chemistry Hydroponics EEI Cody Yakimoff Year 11 – Mrs Bev Gallus 08 Fall 08 Fall “Gardening is not a rational act” ~ Margaret Atwood (Canadian poet, essayist, environmental activist) “Gardening is not a rational act” ~ Margaret Atwood (Canadian poet, essayist, environmental activist) INTRODUCTION 4 RESEARCH 5 AIM 6 HYPOTHESIS 6 RESEARCH INTO...
    5,844 Words | 22 Pages
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    1,770 Words | 7 Pages
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    Biology 1208 Formal Writing Assignment 2 I certify that the writing in this assignment is my individual work and is my intellectual property. It does not contain the ideas or writing of other individuals/authors. Author: Date: March 22, 2012 Lab Section: 5 Lab Topic: Sucrose Effect on Potato Tuber Cells Test question: How does sucrose concentration in a solution effect the osmotic concentration of potato tuber cells? Null Hypothesis: The different sucrose concentration...
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  • Biology Lab - 807 Words
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  • osmosis in gummy bears - 2011 Words
    Investigating the effect of different concentrations of glucose on the percent change in mass of Gummy bears according to their respective colours In this experiment osmosis is the main process taking place. Osmosis is the diffusion of water molecules of a solvent which pass through a semi permeable layer and in most cases are due to a concentration gradient meaning that the water molecules travel from an area of low concentration to one of higher concentration. In this investigation,...
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