Question

If 1.000g of (potash) K2CO3 reacts with H2SO4 to produce 145 mL of CO2 gas at STP, what is percentage of Potassium Carbonate in the marble sample?

Answers

DrBob222
H2SO4 + K2CO3 ==> CO2 + H2O + K2SO4

Convert 145 mL CO2 at STP to moles CO2 (remember 1 mole of ANY gas occupies 22.4L at STP), then use the coefficients in the balanced equation to convert moles CO2 to moles K2CO3, then grams K2CO3.

%K2CO3 = (grams K2CO3/1.00g sample)*100 = ??

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