A litre of buffer solution contains 0.1 mole each of and . On the addition of 0.02 mole of HCl by dissolving gaseous HCl, the pH of the solution is found to be (Nearest integer)

Question

A litre of buffer solution contains 0.1 mole each of  and . On the addition of 0.02 mole of HCl by dissolving gaseous HCl, the pH of the solution is found to be  (Nearest integer)

Canvas Classes · Accepted Answer

Step 1 — After adding HCl:

HCl reacts with :
 remaining =  mol
 =  mol

Step 2 — pOH using Henderson-Hasselbalch:

Step 3 — pH:

Expressed as :

Answer: 9079

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