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Solution: Consider the following reaction: NH4HS(s) ⇌ NH3(g) + H2S(g)At a certain temperature, Kc = 8.5 x 10–3. A reaction mixture at this temperature containing solid NH4HS has [NH3] = 0.166 and [H2S] = 0.166. Will more of the solid form or will some of the existing solid decompose as equilibrium is reached?

Problem

Consider the following reaction: NH4HS(s) ⇌ NH3(g) + H2S(g)

At a certain temperature, Kc = 8.5 x 10–3. A reaction mixture at this temperature containing solid NH4HS has [NH3] = 0.166 and [H2S] = 0.166. Will more of the solid form or will some of the existing solid decompose as equilibrium is reached?