NH4HS(s)-> NH3(g) + H2S(g)

Question

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.

Answer 1

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