Chemistry

Problem

One hundred milliliters of 0.100 M

\mathrm{H_{3}PO_{4}}

are mixed with 75.0 mL of 0.200 M KOH. The reaction proceeds until all hydroxide ions are consumed. What is the concentration of

\mathrm{HPO_{4}^{2-}}

in the final solution? a)

4.3\times10^{-2}\,\text{M}

b) 0 M c)

2.9\times10^{-2}\,\text{M}

3.3\times10^{-2}\,\text{M}