JEE Main 2017 — Ionic Equilibrium Question with Solution
From: JEE Main 2017 (Offline)
Question
pKa of a weak acid (HA) and pKb of a weak base (BOH) are 3.2 and 3.4, respectively. The pH of their salt (AB) solution is :
Choose an option
Show full solutionCorrect option: A
Correct answer
A6.9
Step-by-step explanation
The salt (AB) given is a salt is of weak acid and weak base. Hence its pH can be calculated by
the formula
pH = 7 +
= 7 +
= 6.9
pH = 7 +
= 7 +
= 6.9
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This is a previous-year question from JEE Main 2017, covering the Ionic Equilibrium chapter of Chemistry. PrepSharp catalogues every PYQ from JEE Main with a verified answer key and step-by-step solution prepared by IIT alumni — so you can search by chapter, topic or year and revise efficiently.