Question

calculate the ph of hydronium ion concentration of 1.3 x 10-3 M and hydroxide ion concentration of 4.5 x 10-8 M at 25°c. Show all calculations.

Answer 1

For a hydronium ion concentration of 1.3 x 10^-3 M, the pH is 2.89.

For a hydroxide ion concentration of 4.5 x 10^-8 M, the pH is 6.65.

Step-by-step explanation:

To calculate the pH of a solution, we need to use the formula pH = -log[H3O+].

For the first question, we have a hydronium ion concentration of 1.3 x 10^-3 M. Plugging this into the formula, we get pH = -log(1.3 x 10^-3) = 2.89.

For the second question, we have a hydroxide ion concentration of 4.5 x 10^-8 M. Since [H3O+] x [OH-] = 1.0 x 10^-14, we can calculate [H3O+] = 1.0 x 10^-14 / 4.5 x 10^-8 = 2.222 x 10^-7 M. Plugging this into the formula, we get pH = -log(2.222 x 10^-7) = 6.65.