Chemistry

Problem

Benzoic acid has

K_a=6.3\times10^{-5}

. What initial concentration of benzoic acid should be prepared so that the solution is 5.0\% ionized at equilibrium? a)

2.4\times10^{-1}\,\text{M}

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

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

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