Experiment 11 Calorimetry and Hess’s Law Purpose- To determine the change in enthalpy for four reactions using calorimetry and Hess’s Law Procedures: A. Calibration of the Calorimeter 1. Obtain two copper cylinders and a Styrofoam cup with lid from your lab instructor. Check out a digital thermometer display from the storeroom window. 2. Set up a hot water bath using a 600mL beaker‚ ring stand‚ and Bunsen burner. Weigh the two copper cylinders
Premium Sodium hydroxide Thermodynamics Reagent
07.04 Equilibrium: Hands-On Equilibrium Demonstration Lab Equilibrium Model Materials: • a minimum of 80 small candies‚ coins‚ or other objects • one blank sheet of paper • one notebook Introduction: For this lab‚ we will be using small items‚ such as candies‚ to represent chemical compounds undergoing a reaction. Draw a line down the middle of a sheet of paper and label the left side of the paper “R” for reactants and the right side “P” for products. R P To represent molecules that are
Premium Product Number Reagent
Introduction The experiment is testing for the formation of precipitates caused by different limiting reactants. A precipitate results in a solid formed by an ionic compound. Calcium nitrate and copper sulfate will be added to separate beakers with approximately half of the solutions from the Büchner funnel system of each trial to test for the formation of precipitates. The limiting reactant is the reactant that will run out first in the chemical reaction. It is important to recognize which chemical
Premium Sodium chloride Stoichiometry Reagent
Part 1:Rule of St. Benedict-10pts. Chapter 4: The tools for Goods Works Reflection: 1.) Choose 3 of the Tools of Good Works which you believe you are consistently applying to your life. Give examples of how you do these Good works. Renounce yourself in order to follow Christ. This was written in the book of Matthew 16:24 “Then said Jesus unto his disciples‚ If any man will come after me‚ let him deny himself‚ and take up his cross‚ and follow me.”And also it say this in the
Premium Jesus Bible God
products in a chemical reaction to determine desired quantitative data. Doing stoichiometry can calculate masses‚ moles‚ and percent’s with a chemical equation. The use of stoichiometry is how we were able to find the limiting reagent in this lab. We know that the limiting reagent is the chemical that will be used up first. Two factors affect the yield of product in a chemical reaction: the amounts of starting materials and the percent yield of the reaction. Under certain conditions such as temperature
Premium Stoichiometry Chemical reaction Chemistry
Grignard reagent‚ and react it with benzophenone to give triphenylmethanol. Once made‚ the Grignard reagent will do a nucleophilic attack on the carbonyl carbon of the ketone‚ benzophenone. The result is an alkoxide that is then protonated to give the alcohol‚ triphenylmethanol. The purity of the final product will then be considered by melting point and IR spectroscopy. Final purified triphenylmethanol weighed 8.02 grams and melted at 158.5-162 degrees Celsius. Introduction: Grignard reagents are
Premium Diethyl ether Magnesium Nucleophile
CALCULATIONS Determining the amount Limiting Reagent used. nlimiting reagent = Molarity x Volume or Mass / Molar Mass Example: Limiting reagent is 5mL of 1.0 M HCl nlimiting reagent = Molarity x Volume nlimiting reagent = (1.0 [mol/L]) x 0.005 [L]) = 0.005 mol Determining the qrxn and qcal. qrxn + qcal = 0 -qrxn = qcal qrxn = ΔHrxn x nlimiting reagent qcal = Ccal ΔT qrxn = - Ccal ΔT + mcsolid ΔT (note: only if there is a precipitate formed in the reaction)
Premium Mole Product Reagent
Preparation and SN1 Reactivity of 2-Bromobutane Paul DeJong Department of Chemistry‚ Illinois State University‚ Normal‚ IL 61790-4160 Submitted: April 4‚ 2013 Introduction The purpose of part 1 of the lab is to prepare 2-Bromobutane using SN1 reactions. The purpose of part 2 of the lab is to determine the relative reactivity of alkyl halides under SN1 conditions. Results and Discussion The Overall Reaction The Proposed Mechanism Experimental Procedure To prepare
Premium Chemistry Stoichiometry Chemical reaction
Experiment 1: Calorimetry INTRODUCTION In the calibration of the calorimeter‚ the net ionic equation used is H+(aq) + OH-(aq) H2O(l). The reaction released heat and is said to be exothermic. HCl is the limiting reactant of the reaction and o.oo5 moles of it was used. The heat generated by the reaction is 55.8 kJ. The sign of T of the reaction used for calibration is opposite to that of H. In the determination of heats of reaction‚ the reaction of 15 mL 1 M CuSO4 + 0.05 g Zn produced a
Premium Enthalpy Chemical reaction Thermodynamics
Esmeralda Curiel Organic Chemistry October 21‚ 2014 Experiment 41- 1‚4-Diphenyl-1‚3-Butadiene INTRODUCTION The study of the Wittig Reaction is important because it is often used to form alkenes from carbonyl compounds. The purpose of this experiment is to isolate the trans‚ trans-1‚4-diphenyl-1‚3-butadiene‚ which is formed by a Wittig reaction along with the cis‚ trans isomeric diene. The reaction is carried out in two steps. First the Wittig salt is obtained through a simple nucleophilic displacement
Premium Alkene Carbonyl Reagent