Please provide an explanation Silver acetate, AgC 2 H 3 O 2 , is a sparingly sol

Question

Please provide an explanation

Silver acetate, AgC2H3O2, is a sparingly soluble salt with Ksp = 1.9 x10-3. Consider a saturated solution in equilibrium with the solid salt. Compare the effects on the solubility of adding to the solution either the acid HNO3 or the base NH3.

A) NH3 would decrease the solubility, but HNO3 would increase it.

B) NH3 would increase the solubility, but HNO3 would decrease it.

C) Either substance would increase the solubility.

D) Either substance would decrease the solubility.

E) NH3 would increase the solubility, but HNO3 would have virtually no effect.

Explanation / Answer

C) is the right option,

Reason: Ammonia forms a complex with Ag and hence, decreases Ag+ conc. in the solution carrying the solubility reaction in forward direction. Whereas HNO3 being a strong acid neutralises the weaker acid of the salt and shifts the reaction forward.

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