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Topic: Mass Mass Problems  (Read 2661 times)

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Offline Gold

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Mass Mass Problems
« on: April 06, 2010, 10:13:14 PM »
How many Kilograms of hydrogen sulfide can be prepared by treating 400 g of iron(II) sulfide with an excess of hydrochloric acid?
FeS(s) + HCl(aq) -> FeCl2(aq) + H2S(g) (unbalanced)

This is the question and formula I was given, but I do not know what they mean by an "excess" of hydrochloric acid and do I balance or leave it the way it is?

Offline Schrödinger

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Re: Mass Mass Problems
« Reply #1 on: April 06, 2010, 11:46:48 PM »
Excess of hydrochloric acid means that FeS is the limiting reactant. i.e., you don't have to worry about the amount of HCl present in the reaction mixture
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