Question

If 0.1 moles of Na2HPO4and 0.1 moles of NaH2PO4are mixed in water, what is the resulting pH? The pKavalues for phosphoric acid are 2.1, 7.2, 12.4.
a. 2.1
b. 4.65
c. 7.2
d. 9.8
e. 12.4

Answer

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