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Chem1_Lab Report 9

Chem1_Lab Report 9 - Lab Report 9 Gas Laws Chemistry 1...

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Lab Report 9: Gas Laws Chemistry 1 Teddy Portney June 25, 2007 Summer 1, 2007 1. Purpose: The purpose of this experiment was to use the Ideal Gas Law, PV=nRT, and Avogadro’s Law to calculate the molar mass of a volatile chemical. 2. Experimental Methods: The procedure was followed as described in the handout from Chemistry 1, Summer 2007 at Tufts University for experiment 9; Gas Laws. 3. Data and Observations: Data was collected about the mass of the volatile liquid by weighing the Erlenmeyer flask before and after it had liquid in it. Here is a table showing the mass before and after adding and heating the volatile liquid. The volatile unknown liquid had some blue dye in it, as to help us see when it had all evaporated. When this had happened, there was a minuscule pile of dry blue crystals in the bottom of the flask. This process didn’t take long at all. Our unknown volatile substance came from the bottle marked Unknown #4. 4. Results and calculations: Using the formula PV=nRT, we can rewrite this, solving for n. This gives us the expression n=PV/RT, all given or constant values. Combining this value for the number
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