Question

What is the hydronium ion concentration of a solution with a pOH of 8.30?1.28 × 10-6 M1.99 x 10-6 M2.34 x 10-5 M2.86 x 105 M

Answer 1

In order to find the hydronium ion concentration in this solution, we have to find the pH and we are given the pOH of the reaction, 8.30. The pH and pOH can be used in the same formula to equal 14, which is the highest value of pH, within normal conditions, and the pH and pOH are always opposites in this scale, therefore the formula will be:

pH + pOH = 14

pH = 14 - 8.30

pH = 5.7

Now that we have the pH, we can find the [H3O+], which can be found in the following formula:

[H3O+] = 10^-pH

[H3O+] = 10^-5.7

[H3O+] = 1.99*10^-6, letter B