What Is the PH of a Buffer That Consists of 0.20

question 47

Multiple Choice

What is the pH of a buffer that consists of 0.20 M NaH₂PO₄ and 0.40 M Na₂HPO₄? For NaH₂PO₄, K_a = 6.2*10¯⁸

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

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