Question

Question #d92c6

Answer 1

The hydrogen ion concentration is 5.6 ×10⁻⁵ mol/L.

The definition of pH is

pH = -log[H₃O⁺]

To get the hydrogen ion concentration, we take the antilogarithm of the pH (the `10^x` button on the calculator).

[H₃O⁺] = `10^("-pH") = 10^-4.25` = 5.6 ×10⁻⁵ mol/L