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Grade 12th passPhysical Chemistry

To precipitate as Ag2S(s), all Ag+ present in 250 ml of a saturated solution of AgBrO3 requires 3.36 cm3 ofH2S(g) measured at STP (Assuming H2S is enough soluble in water). Ksp of AgBrO3 is :[Ksp(Ag2S) = 10–50, Ka(H2S) = 10–21]

Profile image of Wow Wowwiz
8 Years agoGrade 12th pass
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Profile image of Arpit Malik
8 Years ago
Ksp = [Ag +] [BrO3-],
we know that AgBrO3 is saturated, so if we find the solubility of Ag, we can refer
to BrO3, and also find the mole Ag.
H2S = 2H+ + S2-;
Ka = [H+]2[S2-]
2AgBrO3 + H2S = Ag2S + 2HBrO3;
2Ag+ + S2- = Ag2S;
Ksp = [Ag +]2[S2-]
10-50 = (2x)2 * x = 4x3
10-50/3 = 4x
X = 10-50/3/4