A Buffer Is Prepared by Combining 10

question 48

Multiple Choice

A buffer is prepared by combining 10.0 g of NaH₂PO₄ with 150 mL of 0.20 M NaOH and diluting to 2.0 L.What is the pH of the buffer? (K_a (H₂PO₄−) = 6.2 × 10−⁸)

• A) 5.12
• B) 6.76
• C) 6.96
• D) 7.20
• E) 7.45

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