Problem: What mass of ZnS (K sp = 2.5 X 10 -22) will dissolve in 300.0 mL of 0.050 M Zn(NO 3)2? Ignore the basic properties of S 2-.

FREE Expert Solution

The dissociation of ZnS and Zn(NO3)2 in water are as follows:


The sulfide ion, S2–, has a charge of –2. Zinc then has a charge of +2:

ZnS(s)  Zn2+(aq) + S2–(aq)


The nitrate ion, NO3, has a charge of –1. Zinc then has a charge of +2:

Zn(NO3)2  Zn2+(aq) + 2 NO3(aq)


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Problem Details

What mass of ZnS (K sp = 2.5 X 10 -22) will dissolve in 300.0 mL of 0.050 M Zn(NO 3)2? Ignore the basic properties of S 2-.

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