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For H3PO4, Ka1 = 7.5 x 10-3, Ka2 = 6.2 x 10-8, and Ka3 = 4.2 x 10-13. An aqueous solution of NaH2PO4 therefore would be
D) a salt.
E) none of the above.
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Based on our data, we think this problem is relevant for Professor Bindell's class at UCF.