What is the hydroxide ion concentration of a lye solution that has a pH of 13.20? A)6.31 × 10^-14 M B)1.58 × 10^-1 M C)0.80 M D)13.20 M

Question

Quizplus · Accepted Answer

The pH is equal to the negative logarithm of the hydrogen ion concentration, so we can use the equation pH + pOH = 14 to find the pOH. 
pOH = 14 - 13.20 = 0.80
The hydroxide ion concentration can be found using the equation: 
pOH = -log[OH-]
0.80 = -log[OH-]
[OH-] = 1.58 × 10^-1 M 
Therefore, the correct answer is B.

What Is the Hydroxide Ion Concentration of a Lye Solution