Hydrochloric acid = HCl
potassium sulfide = K2S
hydrogen sulfide = H2S
When hydrochloric acid is poured over potassium sulfide, 43.1 mL of hydrogen sulfide gas is produced at a pressure of 754 torr and 25.8 oC.
Write an equation for the gas-evolution reaction.
a) HCl + K2S → H2S + KCl
b) 2HCl + K2S → H2S + 2KCl
c) 2HCl + KS → H2S + KCl
d) HCl + KS → H2S + KCl
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