Published by:
CGP EDU Academic Team
Published on: August 14, 2026
A litre of buffer solution contains 0.1 mole of each of NH 3 and NH 4 Cl. On the addition of 0.02 mole of HC1 by dissolving gaseous HC1, the pH of the solution is found to be_________x 10 -3 (Nearest integer)
[Given :pK b (NH 3 ) = 4.745 log 2 ~ 0.301 log 3 = 0.477 T = 298 K]
Text Solution
Verified by ExpertsThe correct answer is:
9079
(9079)
In resultant solution
=0.1-0.02 = 0.08
=0.1 + 0.02 = 0.12
= 4.745 +log 
= 4.745 +log 
= 4.745 + 0.477-0.301
pOH=4.921
pH=14-pH
=9.079
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