The pH of ammonium phosphate solution if pka of phosphoric a

Question

The pH of ammonium phosphate solution, if pk_(a) of phosphoric acid and pk_(b) of ammonium hydroxide are 5.23 and 4.75 respectively, is ___________.

DivineJEE · Accepted Answer

Since (NH_(4))_(3)PO_(4) is salt of weak acid (H_(3)PO_(4)) And weak base (NH_(4)OH).pH = 7 + 1 / 2(pk_(a) - pk_(b))= 7 + 1 / 2 (5.23 - 4.75)= 7.24 = 7.

Explanation

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