What Is the PH of a Buffer That Consists of 0.20

question 83

Multiple Choice

What is the pH of a buffer that consists of 0.20 M NaH₂PO₄ and 0.40 M Na₂HPO₄? [K_a(NaH₂PO₄) = 6.2 × 10^-8]

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

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