Question

Question #c74c8

Answer 1

The hydrogen ion concentration of a pH 3.5 solution is 3.2 × 10⁻⁴ mol/L

The definition of pH is

pH = -log[H₃O⁺], so

-log[H₃O⁺] = 3.5 or

log [H₃O⁺] = -3.5

To calculate [H₃O⁺], we take the antilogarithm of both sides of the equation (the `10^x` key on your calculator).

[H₃O⁺] = `10^-3.5` mol/L = 3.2 × 10⁻⁴ mol/L