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Lab%2008%20%28-%29%20-%20Ideal%20Gas%20Law%20%28STUDENT%29

# Lab%2008%20%28-%29%20-%20Ideal%20Gas%20Law%20%28STUDENT%29...

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Ideal Gas Law Created by Jackie Jurchenko Created by Jackie Jurchenko

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Introduction Ideal Gas Law assumes there are __ attractive forces _____ gas molecules PV = nRT P = ________ (atm) V = volume (__) n = _____ R = gas constant T = temperature (_) Today – solving for R R = PV nT
Calculating P H 2 P H 2 = P bar – P H 2 O You want P H 2 – the gas law equation is all in terms of __. (moles, volume – all of H 2 ) Units need to be in ____….must convert __ atm = ___ mmHg From ________ From graph pg 73

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Example 2 Al ( s ) + 6 HCl ( aq ) 3 H 2 ( g ) + 2 AlCl 3 ( aq ) Suppose 0.064g AL is reacted with excess HCl. If 80.00mL of gas are collected at 25.0 0 C and 725mmHg, what is R? Watch UNITS!! Watch UNITS!! P = 725mmHg . . . . want in atm (760mmHg = 1 atm) = _______ V = 80.00mL . . . . want L = ________ T = 25.0 0 C . . . . want K = ______ n = 0.0640g Al x 1 mol Al

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Unformatted text preview: x 3 mol H 2 = ____________ 26.98 g Al 2 mol Al R = PV nT R = (_____atm)(_______L) (_____K)(_______ mol H 2 ) = ______ L-atm/mol-K Percent Error Compares your value against the actual value. % error = ________ – ____ x 100 _______ (never a negative number) The ______, the more accurate your results R (accepted) = Tips Best results use only ~0.02g Mg (2 trials) Be sure Mg stays in cage! The gas bubbles you see in eudiometer are H 2 When finished, carry beaker over to the chamber Keep finger over hole in stopper when transferring (Don’t let air in or liquid out! - Will ruin reading) Submerge Eudiometer in chamber Must be eye level Reading at an angle will give incorrect data Make liquid levels even...
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