A 40 $\times$ 10^-4 M Solution of MnSO₄ Is Gradually Made More Basic

question 10

Multiple Choice

A 4.0 $\times$ 10^-4 M solution of MnSO₄ is gradually made more basic by adding NaOH.At what pH will manganese(II) hydroxide begin to precipitate? The K_sp of Mn(OH) ₂ is 2.0 $\times$ 10^-13 and K_w = 1.01 $\times$ 10^-14.

• A) 4.70
• B) 9.57
• C) 4.65
• D) 9.35
• E) 9.30

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