Exhibit 15-5 Consider Solving for the PH of a 0

Exhibit 15-5 Consider solving for the pH of a 0.300 M aqueous solution of KCN to answer the following question(s) .
-Refer to Exhibit 15-5. What is the [OH ^- ] ion concentration in this 0.300 M KCN aqueous solution?

A) [OH ^- ] = 1.4×10 ^{- 12} M
B) [OH ^- ] = 2.3×10 ^{- 11} M
C) [OH ^- ] = 2.2×10 ^{- 3} M
D) [OH ^- ] = 0.300 M
E) [OH ^- ] = 1.4×10² M