Exhibit 15-4 Consider Dissolving NaF in Water as Shown in the Equation

Multiple Choice

Exhibit 15-4 Consider dissolving NaF in water as shown in the equation below to answer the following question(s) :
NaF (s) + H₂ O ( ) HF (aq) + NaOH (aq)
-Refer to Exhibit 15-4. What is the base ionization constant , K b , for this reaction?
K a (HF) = 6.8 10 - 4

A) K _b = - 6.8×10 ^{- 4}
B) K _b = 6.8×10 ^{- 18}
C) K _b = 1.47×10 ^{- 11}
D) K _b = 1.47×10 ^{- 4}
E) K _b = 6.8×10¹⁰