Question

What is the solubility product constant for silver phosphate if the solubility of $ A{{g}_{3}}P{{O}_{4}} $ is $ 4.4\times {{10}^{-5}}M $ ?

• A. $ 3.7\times {{10}^{-16}} $
• B. $ 1.0\times {{10}^{-16}} $
• C. $ 5.8\times {{10}^{-9}} $
• D. $ 9.1\times {{10}^{-16}} $

Answer 1

Answer: (B)

For $ A{{g}_{3}}P{{O}_{4}}, $ if s is solubility, then $ {{K}_{sp}}=(3{{s}^{3}})(s)=27{{s}^{4}}=27\,{{(4.4\times {{10}^{-5}})}^{4}} $ $ ={{10}^{-16}} $