Homework Help: AP Chem

Posted by Susan Shoemaker on Tuesday, December 11, 2007 at 9:13pm.

a 4.22 gram sample of copper II sulfide was added to excess hydrocholoric acid with hydrogen sulfide gas being generated and collected over water. What volume of hydrogen sulfide gas would be collected at 32 degrees Celcius and 749 torr? The vapor pressure of water at 32 degrees 36 torr.

AP Chem - DrBob222, Tuesday, December 11, 2007 at 9:40pm
Write and balance the equation.
CuS + 2HCl --> H2S + CuCl2

Convert 4.22 g CuS to mols. Remember mols = g/molar mass.

Convert mols CuS to mols H2S.

Use PV = nRT to calculate volume at the conditions listed.
Post your work if you get stuck.
Note the correct spelling of Celsius.
AP Chem - Anonymous, Friday, December 31, 2010 at 11:35pm
1.18 L

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