"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 amount
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BUFFERS By: Luis P. Bazan‚ RPh.‚ Ph.D. A buffer solution is a solution of: 1. A weak acid or a weak base and 2. The salt of the weak acid or weak base Both must be present! A buffer solution has the ability to resist changes in pH upon the addition of small amounts of either acid or base. Consider an equal molar mixture of CH3COOH and CH3COONa CH3COOH (aq) H+ (aq) + CH3COO- (aq) Adding more acid creates a shift left IF enough acetate ions are present 16.3 Which of the
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At the end of the lecture‚ the students should be able to; 1. Define pharmaceutical solutions. 2. Discuss the advantages & drawbacks of pharmaceutical solutions as dosage form. 3. Explain the formulation components in pharmaceutical solutions. 4. Describe types of pharmaceutical solutions. Solutions are: Dosage forms prepared by dissolving the active ingredient(s) in an aqueous or non aqueous solvent. Solutions can be formulated for different routes of administration Orally: Syrups‚ elixirs‚ drops
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The Holocaust- Final Solution The Final Solution was annihilation of the Jews. Hitler was the one that lead the Nazi’s to kill the Jews. The only way that this or even the Holocaust could have happened was because of World War II. Three things had leaded the Holocaust; if any of these were taken away it could have never happened. Firstly‚ Hitler had to bring all the Jews under his control. In 1939‚ he had only 1% of Jews under his power. In three short years in 1942‚ he had 75% of Jews under
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What is the experiment about? The experiment is about finding the time it takes for a solution of neutrase and milk to clear when using different concentrations of neutrase. Why did I choose to experiment on how the concentration of neutrase effects the time a milk solution takes to clear? I could have chosen to test how the reaction times differed at different temperatures‚ but I chose to experiment on the effect different concentrations of enzymes. The reason I did this was because I felt that
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Chemistry December 14‚ 2010 Conductivity of Ionic solutions Introduction This lab report is about the conductivity of ionic solutions. In class we have been discussing wether all ionic solutions conduct equally well. If an solvent solution conducts electricity‚ then it must contain ions. So measuring the conductance of solutions can tell you whether the solutes in the solution are dissociated into ions. (Conductivity) Any type of solution‚ even ionic solutions‚ provide resistance to the flow
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Post-Lab Questions 1. Using the information provided in the Introduction and your observations from Part 1‚ hypothesize as to the type of electrolyte the following solutions would be. Justify the hypothesis from a chemical standpoint. a. Aqueous Sodium Hydroxide—NaOH (aq) is a very strong base‚ which will completely disassociate into Na+ and OH- ions‚ which would make it a very strong electrolyte. Chemical reaction of the disassociation of Sodium Hydroxide: NaOH (aq)Na+ (aq)+ OH-(aq)
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effects of hypotonic‚ hypertonic and isotonic solutions on mustard green . OBJECTIVE : To study the effects of hypotonic ‚ hypertonic and isotonic solutions on mustard green . PROBLEM STATEMENT : How does the hypotonic ‚ hypertonic and isotonic solutions affect the mustard green ? HYPOTHESIS : An increase the concentration of solutions ‚ as decrease the percentage of change in most of mustard green . MANIPULATED VARIABLE : The concentration of solution . RSEPONDING VARIABLE : Percentage of change
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Name: Basic Coordinates & Seasons – Student Guide There are three main sections to this module: terrestrial coordinates‚ celestial equatorial coordinates‚ and understanding how the ecliptic is related to seasons on the Earth. Each of these sections has its own simulator(s). The background material necessary to utilize these tools is contained in each section. Terrestrial Coordinates Work through the explanatory material on units of longitude and latitude‚ finding longitude and latitude‚ and
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good a material is at conducting heat is known as its thermal conductivity. Thermal conductivity is defined as the rate at which heat flows through a certain area of a Object of the experiment is to determine the thermal conductivity of metals and insulation body.materials and also to demonstrate that heat flow is directly proportional to temperature differences between faces and to cross sectional area. Thermal conductivity is defined as:
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