What is the hydroxide ion concentration of a KOH solution that has a pH of 9.20? A) 6.31 × 10^-10 M B) 1.58 × 10^-5 M C) 4.80 M D) 9.20 M E) 7.20

Question

Quizplus · Accepted Answer

To find the hydroxide ion concentration, we can use the equation:

pH + pOH = 14

We are given that the pH is 9.20, so we can solve for the pOH:

pH + pOH = 14
pOH = 14 - 9.20
pOH = 4.80

To find the hydroxide ion concentration, we can use the equation:

pOH = -log[OH-]

-4.80 = -log[OH-]
[OH-] = 10^-4.80

[OH-] = 1.58 × 10^-5 M

Therefore, the hydroxide ion concentration of the KOH solution is 1.58 × 10^-5 M, which corresponds to choice B.

What Is the Hydroxide Ion Concentration of a KOH Solution