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What Is the PH of a Buffer That Consists of 0.20

Question 88

Multiple Choice

What is the pH of a buffer that consists of 0.20 M NaH₂PO₄ and 0.40 M Na₂HPO₄?
K_a = 6.2 $\times$ 10^-8

A) 6.51
B) 6.91
C) 7.51
D) 7.90
E) 8.13

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