Thermochemistry Lab Purpose: This lab taught procedures for determining heat of capacity of a calorimeter and measuring enthalpy of change for three reactions. It also enforced methods of analyzing data obtained through experimentation and calculating enthalpy. These procedures are used in the branch of thermodynamics known as thermochemistry which is the study of energy changes that accompany chemical reactions. Concepts from this lab can be used to determine the potential energy of a chemical
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CM1191 Experiment 1: Study of Solubility Equilibrium 1. Abstract The aim of this experiment is to determine the relationship between the solubility of potassium hydrogen tartrate (KHC4H4O6) and temperature. Titrate a known concentration of NaOH against a saturated solution of KHC4H4O6 at different temperatures to obtain the concentrations of KHC4H4O6‚ and hence the solubility product constant of KHC4H4O6 at various temperatures. It was found that the solubility product constant of KHC4H4O6
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CHEM 1211 L Principles of Chemistry Lab 16 February 2004 Lab Report 1 Introduction The purpose of this project is to identify an unknown organic acid (X) by conducting various experiments to determine the acid’s unique properties. By determining selected constant properties of the unknown and then comparing these properties to the constant properties of known substances‚ it is possible to identify an unknown substance. The properties used to identify the unknown must be intensive‚ or independent
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presented on a graph to show the endpoint and maximum and minimum temperatures at which the reaction occurs. This will then be used to determine the concentration of the acid. Materials/Apparatus: FB1‚ sulphuric acid (H2SO4(aq))‚ FB2‚ sodium hydroxide (NaOH(aq))‚ Styrofoam cups‚ thermometer‚ 50 cm3 measuring cylinders‚ stopper‚ foil paper‚ 250cm3 beaker Procedure: The temperature of each solution was recorded‚ while taking care to wash and dry the thermometer before the temperature of the second solution
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added NaOH to the flask. For the initial trial they may want to add the base fairly quickly until they notice a pink colour appearing in the flask. Swirling the flask should make the pink colour disappear. At that point they began added the NaOH more slowly‚ swirling the flask after each drop is added. 12. Then they repeat the titration a couple of time more. Data and Results Table 1: Titration of NaOH | Trial 1 | Trial 2 | Trial 2 | | | HCl NaOH | HCl NaOH | HCl
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Quantitative Chemistry –Titration Determination of the Molarity of an Unknown Solution through Acid-Base Titration Technique 1. Introduction 1.1 Aim The aim of this investigation was to determine the precise molarity of two (NaOH(aq)) sodium hydroxide solutions produced at the beginning of the experiment through the acid-base titration technique. 1.2 Theoretical Background Titration is a method commonly used in laboratory investigations to carry out chemical analysis. The most
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antacid is dissolved in HCl‚ and then titrated NaOH is added into the antacid solution until the color turned from clear to a pink. The amount of mL of NaOH needed to turn the solution pink times the total molarity of NaOH will gives the moles of HCl that were neutralized. Experimental Method Four different brands of antacids are tested in this lab. Each antacid was dissolved into 120 mL of HCl into a beaker. Using a
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comparing the acidity of both samples of vinegar with factory analysis data. 2. Principle The content of acetic acid in vinegar will be determined by acid – base titration with the standard solution of sodium hydroxide with approximate concentration c(NaOH) = 1 mol/L. This is prepared using the primary standard reagent potassium hydrogen phthalate. The time for one titration is about 10 minutes. 2.1. Acid – base titration An acid – base titration is a procedure used in quantitative chemical analysis
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hydroxide (NaOH) pellets Potassium acid phthalate (HKC8H4O4) Phenolphthalein Soft drinks samples B. Apparatus 250-ml beaker 250-ml Erlenmeyer flask 100-ml volumetric flask 50-ml buret 10-ml pipet buret holder Stirring rod triple beam balance Bunsen burner Iron stand and ring wire gauze III. Schematic diagram of the procedure IV. Data and Observations Table 1.1. Preparation of the Sodium hydroxide solution Mass before standing Mass after standing Beaker (g) beaker and NaOH pellets(g)
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Equation HX + NaOH NaX + H2O 1 mole 1 mole 1 mole 1 mole Aim To analyze the Vitamin C from a rival company and compare with that of my company and find out the best value for the money spent by the consumer. Controlled Variable * Mass of the tablet and hereby vitamin C in rival company tablets * Consistency of components in the Vitamin C tablet * Concentration of NaOH Apparatus 1. Burette (50ml) 2. Conical flask (50ml) 3. Vitamin C tablet (1 tablet
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