Problem: How many moles of solid NaF would have to be added to 1.0 L of 1.65 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) 2.7 (b) 0.34 (c) 0.98 (d) 1.0 (e) 1.6

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How many moles of solid NaF would have to be added to 1.0 L of 1.65 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) 2.7 

(b) 0.34 

(c) 0.98 

(d) 1.0 

(e) 1.6

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