Question $8(1$ point$)$

If the $pH$ of a voledronic acid solution is $5\mathrm{.}8,$ and the voledronate concentration is $9$

$mM,$ what is the concentration of voledronic acid? $(pKa=5\mathrm{.}0)$

$0\mathrm{.}5$

$1\mathrm{.}4$

$20$

$185\mathrm{.}2$

$379\mathrm{.}5$