A buffer is to be prepared so that the total concentration of acid plus conjugate…

CHEMISTRY · Subjective · A Level · Chemistry · Acids and bases · Acids and bases

Problem

A buffer is to be prepared so that the total concentration of acid plus conjugate base equals

0.100\,\text{M}

in a

500\,\text{mL}

solution. If the target pH is

5.05

and the weak acid has

\text{p}K_a=4.74

, determine the molarity of the conjugate-base species

[A^-]

in the final solution.