The pH of the resultant solution of 20 mL of 0.1 M `H_(3)PO_(4)` and 20 mL of 0.1 M `Na_(3)PO_(4)` is :

The pH of the resultant solution of 20 ml of 0.1 M H_3PO_4 and 20 ml 0.1 M Na_3PO_4 is

What will be the pH of a solution formed by mixing 10 ml 0.1 M NaH_(2)PO_(4) and 15 mL 0.1 M Na_(2)HPO_(4) ? ["Given: for "H_(3)PO_(4)Pk_(a_(1))=2.12, Pk_(a_(2))=7.2]

What will be the pH of a solution formed by mixing 10 ml 0.1 M NaH_(2)PO_(4) and 15 mL 0.1 M Na_(2)HPO_(4) ? ["Given: for "H_(3)PO_(4)pK_(a_(1))=2.12, pK_(a_(2))=7.2]

5 g sample contain only Na_(2)CO_(3) and Na_(2)SO_(4) . This sample is dissolved and the volume made up to 250 mL. 25 mL of this solution neutralizes 20 mL of 0.1 M H_(2)SO_(4) . Calcalute the % of Na_(2)SO_(4) in the sample .

The exact volumes of 1 M NaOH solution required to neutralise 50 mL of 1 MH_(3) PO_(3) solution and 100 mL of 2 M H_(3)PO_(2) solution, respectively, are :

Calculate the pH of resulting solution, when 50 mL of 0.20M HCI is mixed with 50 mL of 0.20M CH_(3)COOH .