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

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

Step-by-step 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^(-)] =([10^(-14)])/([H^(+)])`

=
`(10^(-14))/(10^(-4))`

=
`10^(-10)`M