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Phosphorous acid, H3PO3(aq), is a diprotic oxyacid that is an important compound in industry and agriculture. pKa1...

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Question

Chemistry

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

pKa1 = 1.30

pKa2 = 6.70

Calculate the pH for each of the following points in thetitration of 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

Answer & Explanation Solved by verified expert
3.7 Ratings (523 Votes)
H3PO3 27 MVolume of H3PO3 50 mL 0050 LpKa1 130 Ka1 0050pKa2 670 Ka2 199x107A before addition of any KOHH3PO3 H H2PO3initially 27 0 0finally 27 x x xKa1 xx 27    See Answer
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