"Enthalpy Change For Sodium Hydrogen Carbonate" Essays and Research Papers

  • Enthalpy Change For Sodium Hydrogen Carbonate

    Chemistry Write-Up The Thermal Decomposition of Sodium Hydrogen Carbonate Aim: When Sodium Hydrogen Carbonate (NaHCO3) is heated, Carbon dioxide and water are given off to leave a white powder. The aim is to find the equations for this reaction. Hypothesis: The experiment will prove which of the equations below is true. It will tell us whether Sodium Carbonate is produced or Sodium Oxide. 2NaHCO3  Na2CO3 + CO2 + H2O 2NaHCO3  Na2O + 2CO2 + H2O Variables: Independent: Original...

    Calcium carbonate, Carbon dioxide, Natron 535  Words | 3  Pages

  • Enthalpy Change of Cumbustion of Calcium Carbonates

    Thermometer  Polystyrene cup  Weighing bottle Method I. I will weigh a weighing bottle containing 2.53g of calcium carbonate II. Using a measuring cylinder of 50cm3 I will measure 50cm3 of 2mol dm-3 of hydrochloric acid then pour it into a polystyrene cup III. I will measure the initial temperature of the acid using a measuring cylinder, and then I will add the calcium carbonate to the acid. I will carefully stir the mixture in the cup with the thermometer and then take the final temperature reading...

    Calcium carbonate, Calcium oxide, Carbon dioxide 563  Words | 3  Pages

  • Enthalpy change of reaction

    transformations. A reaction may release or absorb energy, and a phase may change, such as in melting and boiling. Thermochemistry focuses on these energy changes, particularly on the system's energy exchange with its surroundings. In combination with entropy determinations, it is used to predict whether a reaction is spontaneous or non-spontaneous, favourable or unfavourable. Chemical reactions can be divided into two based on the energy changes that occur during the reaction which are endothermic and exothermic...

    Chemical reaction, Chemistry, Energy 1551  Words | 6  Pages

  • Enthalpy Change

    Task 1: Assessment criterion 2.1 Determine the enthalpy change for the reaction (ΔHfθ) between zinc and copper sulphate solution, giving full practical details. Aim To determine the enthalpy change for the reaction between zinc and copper sulphate. Zn (s) + CuSO4 (aq) ZnSO4 (aq) + Cu (s) Introduction In the study of energy (thermodynamics) the system refers to the reacting chemicals (zinc and copper sulphate solution) and the surroundings is everything else (atmosphere...

    Atom, Chemical bond, Covalent bond 530  Words | 4  Pages

  • Determinaing Enthalpy Change of Potassium

    Determining the enthalpy change for the thermal decomposition of potassium hydrogen carbonate into potassium carbonate. Controlled Variables: 1. Volume of HCl ± 0.5 cm3 (± 2%) 2. Concentration of HCl, 3. Same mass of K2CO3 and KHCO3 within specified ranges of 2.5 – 3.0g and 3.25 – 3.75g respectively 4. Same calorimeter used i.e. polystyrene cup is used in this experiment 5. Same thermometer will be used ± 0.10K 6. Same source of K2CO3, KHCO3 and HCl Raw Data Results: ...

    Absolute zero, Chemical reaction, Energy 2164  Words | 7  Pages

  • The Enthalpy of Formation of Magnesium Carbonate

    The Enthalpy of Formation of Magnesium Carbonate By: Jessica Miller T.A: Thomas Lab Partner: Rebekah Melanson Thursday Lab Room 106 Chemistry 1001-A Due Date: Thursday February 3rd 2011 Abstract The purpose of this experiment was to determine the enthalpy of formation of magnesium carbonate in a lab setting. This was done using a calorimeter, which was calibrated by adding a known amount of both hot and cold water. Following the calibration of the calorimeter, HCl was placed into...

    Calorimeter, Calorimetry, Energy 1830  Words | 7  Pages

  • Impure Sodium Carbonate

    Volumetric Determination of Impure Sodium Carbonate (Na2CO3) Introduction: To determine the total amount of carbonate in unrefined sodium carbonate, soda ash, a titration is done using a standardized solution of HCl. Aqueous HCl is a strong acid and therefore almost completely disassociates into H+ and CL-. Therefore, when HCl is used in a titration, the H+ is the titrant. Carbonate in aqueous solution is able to accept a proton, i.e. it acts as a base. When carbonate accepts the H+ a bicarbonate ion...

    Carbon dioxide, Hydrochloric acid, PH 1585  Words | 7  Pages

  • A Lab experiment on how to determine the enthalpy change of the decomposition of Calcium Carbonate

    The Enthalpy Change of the Decomposition of Calcium Carbonate _INTRODUCTION_ RESEARCH QUESTION: What is the enthalpy change of the decomposition of calcium carbonate? BACKGROUND: Enthalpy in chemistry can be thought of as the energy contained within the bonds, or the internal energy, but it is not heat and you can only measure changes in it. When bond bonds break in the reactants energy is given off, when bonds form, energy is absorbed. If the energy absorbed is less than the energy released...

    Calcium, Calcium carbonate, Chemical reaction 512  Words | 5  Pages

  • Determination of Enthalpy Change of Neutralization

    DETERMINATION OF ENTHALPY CHANGE OF NEUTRALIZATION IA Criteria Assessed: DCP CE MS Introduction When an alkali neutralizes an acid, a salt and water are formed. Aqueous hydrogen ions (H+(aq)) from the acid react with the hydroxide ions (OH- (aq)) from alkali, forming water. The identity of salt will depend on the nature of the acid and alkali used. H+(aq) + OH- (aq) → H2O(L) The combination of H+ and OH- ions in this way releases energy. In this practical, the enthalpy changes accompanying...

    Acid, Base, Enthalpy 1572  Words | 7  Pages

  • Determination of the Enthalpy for Decomposition of Hydrogen Peroxide

    Determination of the Enthalpy for Decomposition of Hydrogen Peroxide Objective: To construct a coffee cup calorimeter, measure its calorimeter constant, and determine the enthalpy of decomposition and formation of hydrogen peroxide. Background: This experiment is a classic thermodynamics lab. In it, we attempt to measure the enthalpy (H) of a chemical reaction. The main obstacle is that this is a quantity that cannot be measured directly. It instead is observed as heat from one substance is transferred...

    Energy, Entropy, Fundamental physics concepts 1439  Words | 5  Pages

  • Determination of the Enthalpy of Reaction of a Monobasic Acid with Sodium Hydroxide

    Title : Expt.1 Determination of the enthalpy (heat) of reaction of a monobasic acid with sodium hydroxide Experiment no : 1 Experiment title : Determination of the enthalpy (heat) of reaction of a monobasic acid with sodium hydroxide Objectives: 1) To understand the enthalpy chemistry. 2) To determine the calorimeter constant. 3) To determine the enthalpy reaction of acid-base reactions. 4) To study the exothermic reaction. Apparatus and Materials : * Dewar...

    Energy, Enthalpy, Entropy 1870  Words | 7  Pages

  • Antacids: Calcium Carbonate and Magnesium Compounds

    rebound", a condition whereby the gastric acid returns in greater concentration after the drug effect has ceased. Moreover, this class of antacids is not suitable for all patients owing to its components. For example, the usually high concentration of sodium bicarbonate present in these chemical antacids may be inappropriate for patients afflicted with hypertension or kidney failure. Non Absorbable Antacids The non-absorbable antacids though less prone to cause a rebound effect, have their fair...

    Aluminium, Antacid, Calcium carbonate 1357  Words | 6  Pages

  • Calculation on the Molar Enthalpy Change of a Neutralization Reaction

    on the molar enthalpy change of a neutralization reaction Principle H2SO4(aq)+2NaOH(aq)=Na2SO4(aq)+2H2O(l) The reaction is a exothermic reaction, when the heat released by it is absorbed by water, the temperature of the water increases. The heat produced by the reaction can be calculated if it is assumed that all the heat is absorbed by the water. Heat change of reaction=-heat change of water =-mH2O×cH2O×△TH2O As the water has gained the heat produced by the reaction, the heat change of reaction...

    Acid, Energy, Entropy 1364  Words | 5  Pages

  • Enthalpy Change of Combustion Experiment

    Measuring the Enthalpy change of combustion Abstract This simple experiment is carried out to show the difference in the enthalpy change of combustion between two fuels, hexane and methanol. These fuels are individually weighed before and after used as heat source to heat water in a calorimeter. The result is used to find out amount of heat transferred by the fuel, amount of fuel used and the enthalpy change of combustion. Introduction Enthalpy change of combustion is the enthalpy change when a substance...

    Energy, Enthalpy, Entropy 841  Words | 3  Pages

  • Analysis of Soda Ash and Volumetric Analysis of a Carbonate-Bicarbonate Mixture

    Analysis of a Carbonate-Bicarbonate Mixture Manalo, Ma. Cristina Joyce B. Department of Chemical Engineering, Faculty of Engineering University of Santo Tomas Espana, Manila A. Abstract Crude sodium bicarbonate or commonly known as soda ash may contain amounts of impurities like chlorides and hydroxides. The total acid neutralizing capacity of a soda ash sample, its alkalinity value, was stated in terms of mass of sodium carbonate. In doing so, any sodium hydrogen carbonate present in the...

    Base, Bicarbonate, Carbon dioxide 1789  Words | 6  Pages

  • Detecting Signs of Chemical Change

    Detecting Signs of Chemical Change REAC 399 Prepared by: Elizabeth G. Perez Date of experiment: October 3, 2006 Course: Chemistry 100/60 Abstract: The objective of this experiment will be to combine various substances, liquids and metals, and to observe their behavior when they are combined. The types of reactions observed shall determine the nature of these reactions: physical or chemical. Introduction: An elements¡¦ reaction to certain substances may be predicted by its...

    Acid, Ammonia, Chemical reaction 1412  Words | 6  Pages

  • Enthalpy change Lab # 7

    Enhtalpy change - Hess’ law Experiment #7 Date performed: March 4, 2014 Presented by: Sam Tabah(I.D.#1402433) & Giuliano Amato(I.D.#1328425) General Chemistry 202 Nya-05 (00006) Vanier college Part A. Objective: The objective of this lab was to determine the standard heat formation (∆H°F) of MgO, using a calorimeter and determining the enthalpy of two reactions. Applying Hess’ law we were able to determine the standard heat formation of MgO. Introduction ...

    Energy, Enthalpy, Entropy 1466  Words | 11  Pages

  • Physical and Chemical Change Lab

    Patrick Kelly 10/16/12 Physical and Chemical Changes Lab Question: How do you distinguish a physical and chemical change? Hypothesis: If we use these materials and use magnets, water, burners, and filters on the mixtures and elements given we should determine what kind of effect these materials given will have on these mixtures and elements, physical or chemical. Procedures: -Part A: Record all observations of Part A in Data Table 1 1. Label each substance on seven pieces of paper...

    Carbon dioxide, Chemical reaction, Chemistry 1321  Words | 4  Pages

  • Determination of Enthalpy

    the Enthalpy of a Chemical Reaction All chemical reactions involve an exchange of heat energy; therefore, it is tempting to plan to follow a reaction by measuring the enthalpy change (∆H). However, it is often not possible to directly measure the heat energy change of the reactants and products (the system). We can measure the heat change that occurs in the surroundings by monitoring temperature changes. If we conduct a reaction between two substances in aqueous solution, then the enthalpy of...

    Ammonia, Chemical reaction, Chemistry 1206  Words | 6  Pages

  • Standardization of Hydrochloric Acid by Sodium Carbonate

    Standardization of hydrochloric acid by sodium carbonate Concentrated hydrochloric acid is roughly 11 M. Pour out into a measuring cylinder about 2 cm3 of concentrated hydrochloric acid. Transfer it to a 250 cm3 flask and make up to the mark with water. Shake well. Put some pure sodium hydrogen carbonate or anhydrous sodium carbonate into an evaporating dish and heat gently over a low flame for about fifteen minutes, stirring continuously. Take care not to heat the mass too strongly or fusion...

    Carbon dioxide, Chlorine, Hydrochloric acid 553  Words | 2  Pages

  • Preparation of Sodium Carbonate

    Then it was titrated against thiosulphate solution taken in the burette tgill solution turned light yellow. Then added starch indicator. Added the thiosulphate solution drop by drop near the end point. At the end point the colour of the solution changes from violet to colorless. 7. The above steps were repeated to get three concurrent readings. 8. The above steps were repeated for the other sample of honey. Observations & calculations Deriving the general formula * Molarity...

    Distilled water, Erlenmeyer flask, Fleaker 1179  Words | 6  Pages

  • Heat of Decomposition of Hydrogen Peroxide

    Module name: Physical Chemistry (CP 4117) Experiment: Heat of decomposition of hydrogen peroxide Lecturer: Dr Cheow Name: Loganathan Admin number: 1246102 Contents No. | Contents | Page | 1 | Abstract – a precise summary about the whole experiment and report. | 3 | 2 | Introduction to the experiment - a brief outline and relevant theory for the experiment and calculation | 3-4 | 3 | Procedure for the experiment...

    Calorimeter, Energy, Enthalpy 1999  Words | 7  Pages

  • Observations of Chemical Changes

    of Chemical Changes Observations from Procedures Well#/ Question Chemicals Reaction A NaHCO3 and HCl-CO2 Bubbles B HCl and BTB Turns Orange C NH3 and BTB Still blue- no change D HCl and blue dye Turns green E Blue dye and NaOCl Stays blue – no change F NaOCl and KI Turns pale orange/yellow G KI and Pb(NO3)2 Milky yellow solid H NaOH and phenolphthalein Turns bright pink I HCl and phenolphthalein Bubbles- cloudy J NaOH and AgNO3 Solid formed/ turned brown K AgNO3 and NH3 No change L NH3 and CuSO4...

    Acid, Ammonia, Bicarbonate 502  Words | 2  Pages

  • Chemical and Physical Changes Lab

    Mahlaqua Imran Chemical and Physical Changes Lab 09/09/13 I. Purpose: Identify the different changes as a physical change or a chemical change.  II. Safety: You may need safety goggles and gloves.  III. Pre-lab questions:  1. Identify the following as either chemical or physical changes:  a. Striking a match Chemical b. Food spoiling  Chemical c. Breaking a glass  Physical d. Mowing the grass  Physical ...

    Chemical reaction, Chemistry, Chlorine 663  Words | 3  Pages

  • Physical and chemical change

    Hong Yu Lui Wenzel Chem H D period Sep 13th, 2014 Lab report #1 on chemical and physical properties/ changes Introduction Summary: The purpose of this experiment is to allow students to understand how to differentiate physical and chemical properties and reactions of matter by observing changes of matters under circumstances. Physical properties are properties of matter that can be observed without changing the composition of the matter, including the volume, mass, color, density, and...

    Chemical compound, Chemical element, Chemical reaction 1781  Words | 4  Pages

  • Thermochemistry: Enthalpy Changes in Simple Processes

    Introduction The primary objective of this lab is to be able to determine the specific heat of a reaction by using a calorimeter. A calorimeter is a device used to determine the specific heat of chemical reaction or a physical change. The specific heat a reactions is used to refer to the amount of heat that is lost or gained when one gram of a particular substance increases or decreases by one degree Celsius. When a chemical reaction occurs in an open container most of the energy gained or lost...

    Absolute zero, Ammonia, Heat 2451  Words | 6  Pages

  • Enthalpy

    Planning Exercise 2: Energetics & Alcohols The enthalpy change of combustion of ethanol, ∆Hc, can be determined experimentally under laboratory conditions using the following apparatus. (a) Using the apparatus shown above and any other apparatus required that is normally found in a school laboratory, plan a step-by-step method to determine the enthalpy change of combustion of ethanol, ∆Hc. [4] 1. 2. 3. 4. 5. Measure 50.0 cm3 water with a measuring cylinder and fill into the copper can. Set...

    Energy, Enthalpy, Entropy 610  Words | 3  Pages

  • Determining Enthalpy Change of a Displacement Reaction

    Determining an enthalpy change of a displacement reaction Aim: To determine the enthalpy change for the displacement reaction between zinc powder and copper (II) sulphate solution. Zn (s) + Cu2+ (aq) → Cu2+ (s) + Zn2+ (aq) Theory: For the displacement reaction, an excess amount of zinc powder is added to the measured amount of aqueous copper (II) sulphate. The temperature change over a period of time has to be measured and thus, the enthalpy change for the reaction can be measured. The...

    Absolute zero, Chemical reaction, Fundamental physics concepts 1501  Words | 7  Pages

  • Observation of Chemical Changes

    Allison Lankford January 20, 2012 January 22, 2014 Title: Observation of Chemical Changes Purpose: To observe properties of chemical reactions and to associate chemical properties with household products. Procedure: I used different kinds of chemicals to see the chemical changes that occur when they are mixed together. Data Tables and Observations: CHEMICALS REACTIONS NaHCO3 Bubbles are formed HCl & BTB Turns an orange color NH3 & BTB Turns a dark blue color HCl & blue dye ...

    Acid, Base, Blue 648  Words | 3  Pages

  • Hydrogen Peroxide

    Hydrogen Peroxide & Inorganic Peroxy Compounds Hydrogen Peroxide Hydrogen peroxide (H2O2) is the simplest peroxide (a compound with an oxygen-oxygen single bond). It is also a strong oxidizer. Hydrogen peroxide is a clear liquid, slightly more viscous than water. In dilute solution, it appears colorless.  Reactions Decomposition Hydrogen peroxide decomposes exothermically into water and oxygen gas spontaneously: 2 H2O2 → 2 H2O + O2 This process is thermodynamically favorable. It has...

    Chlorine, Hydrogen, Hydrogen peroxide 2041  Words | 7  Pages

  • Thermodynamics, Enthalpy of Reaction Lab

    Name Lab Partner Name(s) Thermodynamics, Enthalpy of Reaction Lab March 27, 2014 I. Purpose The purpose of this lab is to learn how to determine the heat of reaction. II. Safety 1. Wear appropriate safety attire (goggles, aprons, hair tie, etc.). 2. Do not directly inhale or ingest chemicals. 3. Understand safety information regarding the chemicals being handled during the lab (hydrochloric acid, sodium hydroxide). 4. Be aware of how to operate all lab equipment. 5. Clean hands...

    Calorimeter, Chemistry, Energy 735  Words | 3  Pages

  • Chemical Change

    Chemical Change Lab Name Data Table 1: |Chemicals |Well # |Reaction on White Paper |Reaction on Dark Paper | |NaHCO3 + HCl |A6 |Remains clear. |Remains clear. | |HCl + Blue Dye |B6 |Orange color. |Cannot distinguish color...

    Acid, Base, Blue 688  Words | 3  Pages

  • LAB Report Experiment 7 Investigating Stoichiometry with Sodium Salts of Carbonic Acid

    Seiler April 7th, 2015 Section- 109 Investigating Stoichiometry with Sodium Salts of Carbonic Acid Introduction- This experiment is intended to help find a better understanding of chemical stoichiometry through titrations of NaHCO3 and NA2CO3 with HCl. A chemical reaction is a process that involves rearrangement of the molecular or ionic structure of a substance, as opposed to a change in physical form in a nuclear reaction. Titration is when a measured amount of solution of...

    Carbonate, Chlorine, Hydrochloric acid 868  Words | 4  Pages

  • Enthalpy Change between Metal and Solution of Salt: An Experiment

    This experiment will test the suggestion that the enthalpy change between a metal and a solution of a salt is related to the relative position of the two metals in the reactivity. Presumably the further apart in the series the bigger the enthalpy change will be. The experiment is as follows, 1) Zn(s) + CuSO4(aq) ZnSO4(aq) + Cu(s) 2) Zn(s) + Pb(NO3)2(aq) Zn(NO3)2 (aq) + Pb(s) Both of the solutions will be in 1mol.dm-3 Apparatus: Distilled Water Polystyrene Cup ...

    Absolute zero, Energy, Exothermic reaction 679  Words | 4  Pages

  • Existence of Hydrogen Bonds Between Ethanol Molecules

    Experiment 9 Aim A. To investigate the existence of hydrogen bonds between ethanol molecules. B. To measure the strength of hydrogen bond formed between ethanol molecules C. To investigate the formation of hydrogen bonds between molecules of ethyl ethanoate and trichloromethane. D. To measure the strength of hydrogen bond formed between molecules of ethyl ethanoate and trichloromethane. Procedure A. 1. 10 cm3 of ethanol was added into an insulated 50 cm3 beaker by...

    Atom, Energy, Entropy 692  Words | 5  Pages

  • Observations of Chemical Changes

    brown tint. Homogeneous| G.|KI + Pb(NO3)2||Turns yellow immediately after contact with little yellow powdery chunks. Heterogeneous| H.|NaOH + phenolphthalein||Turns a dark pink/purple and expands. Homogeneous| I.|HCl + phenolphthalein||No color change but expands away from point of contact. Homogeneous| J.|NaOH + AgNO3||Turns a dark brown and separates into small strands of brown liquid within the clear liquid. Heterogeneous| K.|AgNO3 + NH3||Slight bubbling, clear liquid. Heterogeneous| |after...

    Blue, Chemical reaction, Chemistry 852  Words | 4  Pages

  • Observation of Chemical changes

    Observations of Chemical Changes Experiment 1 Chemistry 111 September 3,2014 Ashley Mattox Abstract: The purposes of this lab is to observe the reactions of some common chemicals contained in consumer products and observe the macroscopic changes these chemicals undergo. Purpose: The purpose of the lab is to be able to interpret underlying macroscopic changes in terms of the behavior of atoms and molecules and also to learn how to separate mixtures into their...

    Acid, Base, Chemical reaction 1139  Words | 5  Pages

  • Saponification: Sodium Hydroxide and Soap

    solubility in water. Other raw materials: * Builders These are essentially used to build up soaps. Examples of alkali builders are sodium carbonate, sodium silicate and sodium sulfate. * Fillers Fillers increase the bulk of soap by adding weight, thus reducing the production cost. Clay, kaolin, talc, starch, common salt, chalk and magnesium carbonate are the most commonly used fillers in soap making. * Common salt (Brine) It is used to separate out glycerin and excess caustic from...

    Base, Ester, Saponification 590  Words | 3  Pages

  • Enthalpy of Reactants Lab Report

    of Reactants in a Chemical Reaction 9/6/13 Introduction The purposes of this lab are to measure the temperature change of the reaction between solutions of sodium hydroxide and phosphoric acid, calculate the enthalpy, H, of neutralization of phosphoric acid, and compare the calculated enthalpy neutralization with the accepted value. Theory Calorimetry is the measurement of change of heat in a reaction. A calorimeter is a tool to measure the amount of heat exchange in a chemical reaction (Helmenstine...

    Acid, Chemistry, Energy 593  Words | 4  Pages

  • Observation of chemical change LabPaq

    Observations and Chemical Changes By: Andre the Giant Higgson 02/19/14 CHE  107  E1 Intro to Chemistry 1 Objective Certain Chemicals like Bromthymol blue and Phenolphthalein can be added to other chemicals to  determine acidity or basicity. Other reactions can be observed as well when different chemicals are  added to each other. Procedure This experiment involved placing drops of specified chemicals into a well on a 96­well plate. Each well  number was recorded along with question number and name of chemicals involved...

    Chemical reaction 858  Words | 4  Pages

  • Standardization of Sodium Hydroxide

    12-STANDARDIZATION OF SODIUM HYDROXIDE Standard solutions for titrations are especially pure mixtures with exactly known concentrations. Primary standards are very pure solids. They have the advantage that they can be weighed (the analytical balance is normally the most accurate instrument in the laboratory) and they are stable under laboratory conditions. In this experiment, the primary standard is oxalic acid dihydrate, H2C2O4 ( 2H2O. It will be used to standardize a solution of sodium hydroxide...

    Base, Chemistry, Erlenmeyer flask 1024  Words | 5  Pages

  • Sodium Chloride

    Sodium chloride, also known as salt, common salt, table salt, or halite, is an ionic compound with the formula NaCl. Sodium chloride is the salt most responsible for the salinity of the ocean and of the extracellular fluid of many multicellular organisms. As the major ingredient in edible salt, it is commonly used as a condiment and food preservative. [edit] Properties Thermal conductivity of pure NaCl as a function of temperature has a maximum of 2.03 W/(cm K) at 8 K and decreases to 0.069 at...

    Chlorine, Hydrochloric acid, Ion 1718  Words | 6  Pages

  • Observation chemical change

        Observations of Chemical Changes   Lab Report                                                                                                         Expectations:   Data Table 1: What you Expected to happen Well #/ Question   Chemicals   Reaction A NaHCO3 and HCI - C02  A bubble occurrence   B   HCI and BTB  A deep yellow C NH3 and BTB  A purple color D HCI and blue dye  A deep blue E Blue dye and NaOCI  A greenish color F NaOCI and KI  A bright red G KI and Pb(NO3)2 ...

    Azure, Blue, Color 784  Words | 5  Pages

  • Ib Chemistry Experiment- Calculating Enthalpy Change

    Chemistry Internal Assessment: Determining the Enthalpy Change of a Displacement Reaction AIM: To determine the enthalpy change for the reaction between copper(II) sulfate and zinc. BACKGROUND THEORY: Bond breaking is endothermic while bond forming is exothermic. The reaction between copper(ll) sulfate and zinc is exothermic as the energy required to form the bonds of the products is greater than the energy required to break the bonds of the reactants. In an exothermic reaction, heat is...

    Absolute zero, Chemical reaction, Exothermic reaction 737  Words | 4  Pages

  • sodium

    Sodium From Wikipedia, the free encyclopedia This article is about the chemical element. For the PlayStation Home game, see Sodium (PlayStation Home). For the racehorse, seeSodium (horse). "Natrium" redirects here. For the town in West Virginia, see Natrium, West Virginia. Sodium 11Na ...

    Chemical element, Chemical properties, Chemistry 486  Words | 6  Pages

  • Chemical Changes Lab Report

    Name: Jayanti Magar Title: Observations of Chemical Changes Date: 02/11/015 Pre Lab Questions: Use what you learned in this lab to answer the following questions. A. Suppose a household product label says it contains sodium hydrogen carbonate (sodium bicarbonate). How would you test this material for the presence of sodium bicarbonate? I would add hydrochloric acid (HCl) with carbon dioxide with NaHCO3, and it should bubble and form gas. B. You know what color phenolphthalein and...

    Acetic acid, Blue, Chemical reaction 792  Words | 4  Pages

  • Ibdp Chemistry Ia Enthalpy Change of Neutralisation

    calculate the enthalpy change of neutralization of the given pairs of acid and base. Theory: When alkali neutralizes an acid, a salt and water are formed. Aqueous hydrogen ions, H+(aq) from the acid react with the hydroxide ions, OH-(aq) from the alkali, forming water. Ionic equation: H+ (aq)+OH- (aq) → H2O (l) The identity of the salt will depend on the nature of the acid and alkali used. The combination of H+ and OH- ions in this way releases energy. In this practical, the enthalpy changes...

    Acid, Base, Chlorine 2652  Words | 11  Pages

  • Sodium carbonate (Na2CO3)

    Analysis of Soda Ash and Volumetric Analysis of a Carbonate-Bicarbonate Mixture Buti, Mary Daphne A. Department of Chemical Engineering, Faculty of Engineering University of Santo Tomas España, Manila Abstract Sodium carbonate (Na2CO3), commonly known by trade name soda ash, is a white, anhydrous, powdered or granular material that is an essential raw material used in the manufacturing of glass, detergents, chemicals, and other industrial products. In this experiment, the percent alkalinity...

    Chlorine, Hydrochloric acid, Sodium bicarbonate 2684  Words | 9  Pages

  • Experiment on the Decomposition of a Carbonate

    AIM: To carry out a lab experiment to decompose a carbonate using heat, also to carry out appropriate tests for the formation of products as a result of this decomposition. DISSCUSION: Carbonates are decomposed by heat into the corresponding oxides and carbon dioxide. The temperature of decomposition depends upon the activity of the metal; that is to say, the more active the metal, the more stable is the carbonate. Thus, the carbonates of sodium and potassium are stable at the highest temperature...

    Calcium carbonate, Carbon, Carbon dioxide 620  Words | 4  Pages

  • Observations of Chemical Changes

    Chem 181 DL1 Professor Snyder Rebecca Hansen Observations of Chemical Changes 9/10/12 Experiment: To examine the reactions of some common chemicals contained in Consumer products and observe the macroscopic changes these chemicals undergo. Examining reactions of common chemicals contained in consumer products. In this lab, it will show the macroscopic changed the chemicals undergo. Objective: To observe some properties of chemical reactions and to associate chemical properties with household...

    Azure, Base, Chemical reaction 1402  Words | 5  Pages

  • Standardization of Sodium Hydroxide Solution

    Abstract. This report is about how to standardize a Sodium Hydroxide (NaOH) solution by titrating it with pure sample of Potassium acid Phthalate (KHC8H4O4). This experiment has two sections. The first section is to standardize the Sodium Hydroxide by titration. Three sample of 0.7 – 0.9 g of solid KHP are place into each of the three numbered Erlenmeyer flasks. 50 ml of distilled water are added to each three of it from graduated cylinder and constantly shake it until the KHP solution are completely...

    Acid, Base, Chemistry 1535  Words | 6  Pages

  • Observations of Chemical Changes

    Questions and Analysis: A) Suppose a household product label says it contains sodium hydrogen carbonate (sodium bicarbonate). How would you test this material for the presence of sodium bicarbonate? You would test for this compound by preparing a diluted acid solution such as hydrochloric acid. Then it would be added to the suspected substance that contained sodium bicarbonate. If the substance really contained sodium bicarbonate then carbon dioxide would result in the reaction of the household...

    Acetic acid, Acid, Ammonia 1385  Words | 5  Pages

  • Sodium Bicarbonate and Boxing

    KNES 470 Dr Rubin 4-18-12 Sodium Bicarbonate and Boxing Performance Boxing is a sport which relies on anaerobic power since it contains short-duration and high intensity work. A typical boxing match today consists of 3 minute rounds with a 1 minute seated recovery rest. When an athlete performs exercise at maximal level for more than 30 seconds, most of the energy comes from anaerobic glycolysis. During this process, lactic acid is produced which causes a decrease in pH levels within the muscle...

    Acid, Blood, Boxing 1177  Words | 4  Pages

  • Thermochemistry: Solid Sodium Hydroxide

    the law that bears Hess's name says: The enthalpy change for any reaction depends on the products and reactants and is independent of the pathway or the number of steps between the reactant and product. In this experiment, you will measure and compare the quantity of heat involved in three reactions. These heats of reaction will be measured using a styrofoam calorimeter. The three reaction are shown below. Reaction 1: The dissolving of solid sodium hydroxide in water.                        ...

    Chemical reaction, Chlorine, Enthalpy 1113  Words | 5  Pages

  • Exp. Observation of Chemical Changes

    Name: Jocelyne Munguia|Date: 6/12/13| Exp 1: Observations of Chemical Changes|Lab Section: 75426| Data Tables: Part 1: |Chemicals|Well No.|Observations of the Reaction| A.|NaHCO3 + HCl|A2|Tiny bubbles formed around the edges. Under white paper it looked transparent, but under black paper there was some white in the middle. | B.|HCl + BTB|A3|The mixture turned yellow instantly. Under white paper the mixture was more of mustard yellow and under black paper it was less of a bright yellow. | C...

    Azure, Blue, Color 1353  Words | 5  Pages

  • Observations of Chemical Changes

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