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What is the pH of a buffered solution saturated with hydrogensulfide ([H2S] = 0.10 M)...

What is the pH of a buffered solution saturated with hydrogen sulfide ([H2S] = 0.10 M) at 25°C if PbS (s) is precipitated, leaving [Pb2+] = 1.0 × 10–7 M, without precipitating any MnS (s)? The original solution is 0.030 M in both Pb2+ (aq) and Mn2+ (aq). Ksp = 8.0 × 10–28 M2 for PbS (s),Ksp = 2.5 × 10–13 M2 for MnS (s), and

Select one:

a. 0.03

b. 2

c. 0.4

d. 7

0 0
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