Question #$9$:

Using the amount of base used in step three and the correct equation below, determine the concentration of the acid in $mM.$

mono protic acid

$M_{\text{a}\text{c}\text{i}\text{d}}{V}_{\text{a}\text{c}\text{i}\text{d}}=M_{\text{b}\text{a}\text{s}\text{e}}{V}_{\text{b}\text{a}\text{s}\text{e}}$

diprotic acid

$M_{\text{a}\text{c}\text{i}\text{d}}{V}_{\text{a}\text{c}\text{i}\text{d}}=\frac{M_{\text{b}\text{a}\text{s}\text{e}}{V}_{\text{b}\text{a}\text{s}\text{e}}}{2}$

diprotic acid

$M_{\text{a}\text{c}\text{i}\text{d}}{V}_{\text{a}\text{c}\text{i}\text{d}}=\frac{M_{\text{b}\text{a}\text{s}\text{e}}{V}_{\text{b}\text{a}\text{s}\text{e}}}{2}$

triprotic acid

$M_{\text{a}\text{c}\text{i}\text{d}}{V}_{\text{a}\text{c}\text{i}\text{d}}=\frac{M_{\text{b}\text{a}\text{s}\text{e}}{V}_{\text{b}\text{a}\text{s}\text{e}}}{3}$