Question

NH4HS(s)-> NH3(g) + H2S(g)
What direction does the equillibrium shift when NH4HS is added?

I think that the equillibrium won't shift since we are adding a pure solid and pure solids are not included in the equillibrium expression. Just want to make sure.

Answers

You are correct as long as there is at least one molecule of NH4HS present when equilibrium is established.

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