Question

find the pH and the pOH of the solution
1. 0.023 M solution of perchloric acid
2. 6.6 x 10^-6 M solution of nitric acid
3. 0.0334 M solution of potassium hydroxide

Answer 1

Ok so the PH for each solution will be
1.) 1.638 2.) 5.2 3.) 12.524
This is found using the formula:  pH = - log [H3O+].
And the pOh for each one will be 
1.) 12.362 2.) 8.8 3.) 1.4763
This is found by the formula pOH = -log10[OH-]
Hope this is useful