The Total solution for NCERT class 6-12
The ionization constant of benzoic acid is6.46 × 10–5 and Ksp for silver benzoateis 2.5 × 10–13. How many times is silver benzoate moresoluble in a buffer of pH 3.19 compared to its solubility in pure water?
SincepH = 3.19,
Let the solubility of C6H5COOAg be x mol/L.
Then,
Thus, the solubility of silver benzoate in apH 3.19 solution is 1.66 × 10–6 mol/L.
Now, let the solubility of C6H5COOAg be x’ mol/L.
Hence,C6H5COOAg is approximately3.317 times more soluble in a low pH solution.