Determine the concentration of H in moles per liter in an aq

Determine the concentration of H+ in moles per liter in an aqueous solution having a pH of 11.6.

Solution

If pH = 11.6

from relation, pH + pOH = 14

then pH = 14 - pOH

pH = 14 - 11.6

pH = 2.4

Now, [H+] = 10^-pH

[H+] = 10^-2.4

[H+] = 0.0039M

[H+] = 3.9 x 10^-3M