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Q 1138523402.     An aqueous solution of a metal bromide `MBr_2 (0.05 M)` is saturated with `H_2S.` What is the minimum `pH` at which `MS` will precipitate?
`K_(sp)` for `MS = 6.0 × 10^-21`, conc. Of saturated `H_2S = 0.1` M and `K_1 = 10^-7` and `K_2 = 1.3 × 10^-13,` for `H_2S. `
Use formula: `K = K_1 × K_2 `
(Provided By a Student and Checked/Corrected by EXXAMM.com Team)