The acid HOCl (hypochlorous acid) is produced by bubbling chlorine gas through a suspension of solid mercury(II) oxide particles in liquid water according to the equation
2 HgO(s) + H2O(l) + 2 Cl2(g) ⇌ 2 HOCl(aq) + HgO⋅HgCl2(s)
What is the equilibrium-constant expression for this reaction?
a. K = [HOCl]2/[Cl2]2
b. K = [HOCl]2[HgO⋅HgCl2]/[Cl2]2[H2O][HgO]2
c. K = [HOCl]2/[Cl2]2
d. K = [HOCl]2[Cl2]2/[H2O]
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