Question

The pH scale for acidity is defined by pH= -log subscript 10 [H superscript+] where [H superscript+] is the concentration of hydrogen ions measured in moles per liter (m).

A solution has a pH of 8.4
Calculate the concentration of hydrogen ions in moles per liter (M)

Answer 1

The concentration of hydrogen ions in moles per liter (M) is
`3.981 * 10^(-9)`

Explanation:

As we know

The hydrogen ion concentration of any solution at pH is given by

`H^+ = 10^(-pH)`

Substituting the given values in above equation, we get -

`H^+ = 10^(-8.4)\\H^+ = 3.981 * 10^(-9)` mol/l

The concentration of hydrogen ions in moles per liter (M) is
`3.981 * 10^(-9)`