Problem: How many moles of solid NaF would have to be added to 1.0 L of 1.90 M HF solution to achieve a buffer of pH 3.35? Assume there is no volume change. (Ka for HF = 7.2 x 10 -4) A. 3.1 B. 2.3 C. 1.6 D. 1.0 E. 4.9 

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How many moles of solid NaF would have to be added to 1.0 L of 1.90 M HF solution to achieve a buffer of pH 3.35? Assume there is no volume change.

(Ka for HF = 7.2 x 10 -4)

A. 3.1

B. 2.3

C. 1.6

D. 1.0

E. 4.9 

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