Question

At 25c the [H+] of sol. is 2*10^-9 m. The nature of the sol. is

Answer 1

   

Solution is basic.  

since the pH = 8.699 , which is >   7 .

Explanation:

pH =- log ( H+)

NOW  H+ =2* 10 ⁻⁹

pH = - log (2* 10 ⁻⁹ )               // using log propeerty log(a*b) = log a+log b

        = - log (2 ) - log (10⁻⁹)

       =  - 0.301 + 9

      = 8.699

now since the pH > 7 the solution is basic.