JEE Main 2021 — Ionic Equilibrium Question with Solution
From: JEE Main 2021 (Online) 26th February Evening Shift
Question
The pH of ammonium phosphate solution, if pka of phosphoric acid and pkb of ammonium hydroxide are 5.23 and 4.75 respectively, is ___________.
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Show full solutionCorrect answer: 7.24
Correct answer
7.24
Step-by-step explanation
Since (NH4)3PO4 is salt of weak acid (H3PO4) & weak base (NH4OH).
pH = 7 + (pka pkb)
= 7 + (5.23 4.75)
= 7.24 7.
pH = 7 + (pka pkb)
= 7 + (5.23 4.75)
= 7.24 7.
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