What is the concentration of ions from Ksp?

[TT0]

Homework Statement

Homework Equations

The Attempt at a Solution

I am not too confident with my knowledge of Ksp so just checking my answer. Ksp = [Hg2+][S2-]

Therefore root Ksp to get [Hg2+] = 1.2649*10^-26. So answer is B. Is this right?

Cheers!

 

[Borek]

This is tricky (and to be honest, question is stupid).

Yes, they expect answer B. No, it is not true, as S^2- is a relatively strong base reacting with water to produce HS^- and OH^-, removing S^2- and shifting the dissolution to the right (not to mention zilions of other side reactions between Hg²⁺ and water, but let's just stick with the most obvious one).

 

[TT0]

Haha, that is way above my level! Thanks!