Please help me answer this question correctly

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answerhappygod
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Please help me answer this question correctly

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Please help me answer this question correctly
Please Help Me Answer This Question Correctly 1
Please Help Me Answer This Question Correctly 1 (35.64 KiB) Viewed 11 times
The acid-dissociation constants of phosphorous acid (H3PO3) are Ka1 = 7.5 x 103, Ka2 = 6.2 x 108, and Ka3 = 4.2 x 10-13 at 25.0°C. Which dissociation constants would you use to solve for the pH of 0.5M solution of NaHPO3? O None of the choices are true OKb3 and Kal Kb1 and Ka2 Kb2 and Ka3 O Kb3 and Ka2 O Kal O Kb3
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