The electrolytic reduction of 300 mL of 0.01 M nitroalkane was carried out in acidic…

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

Problem

The electrolytic reduction of 300 mL of 0.01 M nitroalkane was carried out in acidic buffer medium of pH 5.0 following the change :

\text{RNO}_2 + 4\text{H}_3\text{O}^+ + 4e \rightarrow \text{RNHOH} + 5\text{H}_2\text{O}

If the total concentration of weak acid and its conjugate base was 0.50M, calculate the pH of solution after completion of reduction.

K_a

for weak acid is

1.8 \times 10^{-5}