Question

The measure of the pH of the acidic solution that results is given by: pH = -log (H3O+) What is the pH of a 0.057M HBr aqueous solution that completely dissociates in water? Note: Please give your answer to two decimal places. This will be correct with respect to significant digits and logarithms and the molarity you are given.

Answer 1

Assuming that the acid dissociates into ions completely, therefore the components in the solution are water, H+ and Br-. There is 1:1 ratio with HBr and H+ ion so the concentration of H+ is 0.057 M as well.

pH = -log (0.057) = 1.24

Hope this answers the question.