Question

Determine the pH of a 2.2 x 10-11 M NaOH solution.

Answer 1

[AI-generated answer — Bot GPT 3.5]

To determine the pH of a NaOH solution, we first need to calculate the pOH of the solution using the concentration of NaOH.

Given:
[NaOH] = 2.2 x 10^-11 M

Since NaOH is a strong base, it will fully dissociate in water into Na+ and OH- ions. Therefore, the concentration of OH- ions in the solution is equal to the concentration of NaOH.

pOH = -log[OH-] = -log(2.2 x 10^-11) = 10.66

Since pH + pOH = 14, we can now calculate the pH:

pH = 14 - pOH = 14 - 10.66 = 3.34

Therefore, the pH of a 2.2 x 10^-11 M NaOH solution is 3.34.