Identify the equation for which Keq = [Cu+]2[S2-].


A) CuS(s) ⇌ Cu2+(aq) + S2- (aq)

B) 1/2Cu2S(s) ⇌ Cu+(aq) + 1/2 S2- (aq)

C) Cu2S(s) ⇌ 2Cu+(aq) + S2- (aq)

D) Cu2S(s) ⇌ Cu+(aq) + 2 S2- (aq)

E) none of the answers

2 answers

What's the problem here? Do you know the definition of Keq?
The "K" in Keq stands for "Constant". The "eq" means that the reaction is at equilibrium. Very roughly, Keq tells you the ratio of Products/Reactants for a given reaction at equilibrium.
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