Hydrofluoric acid, HF, is often used to etch glass. What is the value of K b for the fluoride ion, F-?
A. 3.5 x 10-18
B. 3.5 x 1010
C. 1.0 x 10-14
D. 7.1 x 10-19
E. 2.9 x 10-11
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