Question

Rank H3PO4, H2PO4-, and HPO42-in order of increasing acid strength.
A) HPO42-< H2PO4-< H3PO4
B) H2PO4-< HPO42-< H3PO4
C) H2PO4-< H3PO4< HPO42-
D) HPO42-< H3PO4< H2PO4-
E) H3PO4< H2PO4-< HPO42-

Answer

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