1Chris Tomlinson (Zack and Alan) Lab Report - Experiment 1 September 18 th , 2006 Abstract Determination of the Formula of a Chemical Compound Scientists often have to deal with compounds that have multiple atomic formulas and need to find out which compound they are dealing with. Evaporation and filtration were used to separate different components of the compound. Calculating the number of moles in each component, a mole ratio could be used to figure out the atomic formula of the compound. There was a 2.1:1 ratio of Water:Copper and a 2.4:1 ratio of chlorine:copper, suggesting that the compound we dealt with involved 1 mole of water: 1 mole of copper: 2 moles of chlorine. Since some of the copper was lost, we can assume the aforementioned mole ratio is correct, and the dehydrated sample we dealt with was CuCl 2 instead of CuCl. Results and Discussion Atomic Masses: Cu 63.546 Cl 35.453 H 1.008 O 16.00 Mass of Crucible 19.952 g Mass of Crucible and Hydrated Sample 20.952 g Mass of Hydrated Sample
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