Ionic EquilibriumHard

Question

pH of 0.01 M HS- will be:

Options

A.pH = 7 +
B.pH = 7 -
C.pH = 7 +
D.pH = 7 +

Solution

HS- + H2O ⇋  H2S + OH-
∴  [OH-] = Ch =    ∴   [H+] =
or  pH = 1/2[pKw + pKa + logC]

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