Question

if the concentration of the hydroxyl 10 - 11 mole per metre then find the value of ph solution​

Answer 1

When we say an acid solution, then the pH should ALWAYS be less than 7 (<7).

In this problem it means beyond the neutral concentration of 10–7 mol/ Lit, it has an extra concentration of 1 x 10^-9. So the concentration of H+ion is (1 x 10-7+1 x 10–9)= 1.01 x 10–7 M.

The Kw=1 x 10–14, =[H+] [OH-] is the ionic product of water. If H+ is 1.01x10–7,

then pH= - log(1.01 x 10^-7)= 6.9957

then OH- =( 1 x 10^-14)/1.01 x 10–7) =9.9 x10-8 M/Lit.