Exhibit 15-1 the PH of a Certain Brand of Milk

Exhibit 15-1 The pH of a certain brand of milk is 6.60. Use this information to answer the following question(s) .
-Refer to Exhibit 15-1. What is the molar concentration of hydroxide ion , [OH ^- ], in this milk?

A) 2.5×10 ^{- 21} M
B) 1.2×10 ^{- 14} M
C) 1.5×10 ^{- 14} M
D) 1.7×10 ^{- 9} M
E) 4.0×10 ^{- 8} M