Gas Review Problem #6

6)  Iron (II) sulfide reacts with hydrochloric acid as follows:

FeS(s)  +  2 HCl(aq)  -->  FeCl₂(aq)  +  H₂S(g)

What volume of H₂S, measured at 30^oC and 95.1 kPa, will be produced when 132 g of FeS reacts?

Calculate number of moles of H₂S...

        x mole H2S  =  132 g FeS  = 1.50 mol H₂S

Write given information:

•     P  =  95.1 kPa

•     n  =  1.5 mole H2S

•     R  =  8.314 L kPa/mol K

•     T  =  30^oC  +  273  =  303 K

Equation:    PV  =  nRT

Substitute into Equation:       

Solve equation for Volume:  V  =  39.7 L