The solubility product of CaF is and the acid-dissociation constant of HF is

CHEMISTRY · Single correct · AP · Chemistry · Acids and Bases · Acids and Bases

Problem

The solubility product of CaF

_2

K_{sp}=3.9\times10^{-11}

and the acid-dissociation constant of HF is

K_a=6.6\times10^{-4}

. Calculate the molar solubility of CaF

_2

in a solution that is buffered at pH 2.00. (a)

2.1\times10^{-4}\,\text{M}

(b)

2.2\times10^{-3}\,\text{M}

(c)

1.3\times10^{-3}\,\text{M}

(d)

6.6\times10^{-3}\,\text{M}