Chemistry / Selective Precipitation
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Solution: Consider a solution containing the group III cations Ni 2+ a...

Question

Consider a solution containing the group III cations Ni 2+ and Mn 2+ (each with a concentration of 0.10 M) is treated with thioacetamide and heated to 80°C while buffered at a pH of 8.

Which of the following statements best describes the solution after the reaction?

a. The cations remain dissolved in solution

b. NiS and MnS precipitates form

c. NiS and MnS precipitates partially form

d. Ni(OH)2 and Mn(OH)2 precipitates form

e. Ni(OH)2 and Mn(OH)2 precipitates partially form