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Unformatted text preview: Grading: 35 pts for this template Data and Calculations Unknown Number 2 2 pts Sample #1 Sample #2 Mass of Unknown 2.05 g 2.03 g Mass of filter paper 0.75 g 0.72 g Mass of filter paper and copper 1.39 g 1.33 g Mass of copper 0.64 g 0.62 g % mass of copper 31.06 % 30.42 % Formula weight of unknown 204.60 amu 208.91 amu Average formula weight 206.76 Unknowns Formula weights (amu) Copper(II) chloride dihydrate 170.48 1pt Copper(II) sulfate pentahydrate 249.7 1pt Copper(II) acetate monohydrate 199.65 1pt Identity of your copper salt 1pt % Error 3.55665% Name: Alice Hsieh Lab Partner: Doung Hieu amu 2pts Cu(C 2 H 3 O 2 ) 2 H 2 O Lab 4: Stoichiometry II Percent Copper and Formula of a Copper Compound Purpose and Method Things to think about: What is the goal of this experiment? What is the general method (not step by step detailed procedure) that you will be using to achieve this goal? (Include the chemical reaction to help explain.) How will you process the data that you record in lab? (What calculations will you use and how do you obtain all of the values to plug into those equations?) (6 points) The goal of this experiment is to determine the percent copper of an unknown copper containing compound as well as...
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This note was uploaded on 10/27/2010 for the course CHEM 142 taught by Professor Zoller,williamh during the Winter '07 term at University of Washington.
- Winter '07