Question

Order the following from the lowest concentration of free hydrogen ions to the highest: a) Washing soda with a pH of 8-10, a solution of H_2SO_4 with a pH of 6.5 b) A solution of H_2SO_4 with a pH of 6.5, washing soda with a pH of 8-10

Answer 1

H2SO4 with a pH of 6.5 has the lowest hydrogen ion concentration.

Step-by-step explanation:

The solutions to be ranked include:

a) Washing soda with a pH of 8-10,

b) A solution of H_2SO_4 with a pH of 6.5

pH is a measure of the free hydrogen ion concentration and is defined as: pH = - log[H^+], where [H^+] is the free hydrogen ion concentration.

A pH of 8 means [H^+] = 1 x 10^-8 Molar

a Ph of 10 is [H^+] = 1 x 10^-10 Molar

And a pH of 6.5 is [H^+] = 3.16 x 10^-7 Molar

The H2SO4 with a pH of 6.5 has the lowest hydrogen ion concentration.