Question

Suppose you had a dilute solution of sulfuric acid (H2SO4), and found its pH to be 4. What is the molar concentration of H+ in this solution? What is the predicted molar concentration of OH- in this solution?

Answer 1

Answer:

The molar concentration of  $H^{+}$ in the solution is   $=10^{-4}M$ and Predicted molar concentration of $OH^{-}$ in the solution is $10^{-10}$M

Explanation:

Given :

      $pH = - log[H^{+}]$

             = 4

Molar concentration of $H^{+}$ in the solution is:

     $[H^{+}]=10^{-pH}$

             $=10^{-4}M$

$[H^{+}][OH^{-}] = k_{w}$

                  $= 10^{-14}$

Predicted molar concentration of $OH^{-}$ in the solution is:

      $[OH^{-}] =\frac{[10^{-14}]}{[H^{+}]}$

                  = $\frac{10^{-14}}{10^{-4}}$

                 =$10^{-10}$M