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JEE MAIN 2021
26.02.2021_S2
Question
The pH of ammonium phosphate solution, if $\mathrm{pk}_{\mathrm{a}}$ of phosphoric acid and $\mathrm{pk}_{\mathrm{b}}$ of ammonium hydroxide are 5.23 and 4.75 respectively, is $\_\_\_\_$ .
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