Question

Which option correctly shows the concentration of H3O+ ions in pure water (pH 7) ?(1 point)
Responses

1.0 x 10–14 mol/L
1.0 x 10 superscript minus 14 mol/L

7 mol/L
7 mol/L

14 mol/L
14 mol/L

1.0 × 10–7 mol/L

Answer 1

1.0 × 10^−7 mol/L

Explanation: pH = 7 means [H3O+] = 10^(−pH) = 10^(−7) M = 1.0 × 10^−7 mol·L^−1.