Chemistry

Problem

Calculate the change in pH of 1 litre buffer solution containing 0.1 mole each of

\text{NH}_3

and

\text{NH}_4\text{Cl}

up on addition of: Assume no change in volume.

K_{\text{NH}_3} = 1.8 \times 10^{-5}

(i) 0.02 mole of dissolved gaseous HCl. (ii) 0.02 mole of dissolved NaOH.