Question

Calculate the pOH of a solution that contains 2.4 x 10^(-5) M H3O at 25 degrees C.

Options:
A) 4.62
B) 9.38
C) 10.62
D) 11.54

Answer 1

To calculate the pOH of a solution, we can use the formula:

pOH = -log(OH-) The correct answer is: c) 10.62

Step-by-step explanation:

The correct answer is:

c) 10.62

To calculate the pOH of a solution, we can use the formula:

pOH = -log(OH-)

Given that the concentration of H3O+ is 2.4 x 10^(-5) M, we can use the fact that in a neutral solution, the concentration of H3O+ and OH- are equal. Therefore, the concentration of OH- is also 2.4 x 10^(-5) M.

Using the formula, we can calculate the pOH:

pOH = -log(2.4 x 10^(-5)) = 4.62

Since the pH + pOH = 14, the pH of the solution is:

pH = 14 - 4.62 = 9.38

Therefore, the correct answer is:

c) 10.62