Phosphorous acid, H3PO3(aq), is a diprotic oxyacid that is an important compound in industry and agriculture...

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Chemistry

Phosphorous acid, H3PO3(aq), is a diprotic oxyacid that is animportant compound in industry and agriculture pka1=1.3 pka2=6.70Calculate the pH for each of the following points in the titrationof 50.0 mL of a 2.7 M H3PO3(aq) with 2.7 M KOH(aq)
a) before addition of any KOH
(b) after addition of 25.0 mL of KOH
(c) after addition of 50.0 mL of KOH
(d) after addition of 75.0 mL of KOH
(e) after addition of 100.0 mL of KOH
please help? ill rate 5 stars if correct!

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3.9 Ratings (605 Votes)

a For the first dissociation of H3PO3 H3PO3 H2PO3aq Haq Ka1 1013 5012102 InitconcM 27 0 0 eqmconM 271 x 27x 27x 5012102 27x27x 271 x x 01273 Hence Haq 27x 2701273 03437 M Since Ka2 is very small the amount of H produced due tosecond dissociation can be neglcted Hence total concentration of H is Haq 03437 M pH logHaq See Answer

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