Explain what is the ph of the buffer for phosphoric acid

Reference no: EM13240841

A solution is prepared by dissolving 20.0 g of K2HPO4 and 25.0 g of KH2PO4 in enough water to produce 1.0 L of solution. What is the pH of this buffer?
For phosphoric acid (H3PO4), Ka2 = 6.2 10^-8.

A) 7.70
B) 7.42
C) 7.21
D) 7.00
E) 6.72

Reference no: EM13240841

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