How Many Moles of Solid NaF Would Have to Be

question 20

Multiple Choice

How many moles of solid NaF would have to be added to 1.0 L of 1.85 M HF solution to achieve a buffer of pH 3.35? Assume there is no volume change.(K_a for HF = 7.2 × 10^-4)

• A) 3.0
• B) 0.38
• C) 0.87
• D) 1.0
• E) 1.6

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