Question

If an aqueous solution has a hydroxyl ion concentration of 1 × 10 − 6 M, what is the concentration of hydrogen ion ( [ H + ] ) ?

Answer 1

Answer : The concentration of
`H^+` ion is,
`1* 10^(-8)M`

Explanation : Given,

Concentration of
`OH^-` ion =
`1* 10^(-6)M`

First we have to calculate the pOH.

`pOH=-\log [OH^-]`

`pOH=-\log (1* 10^(-6))`

`pOH=6`

Now we have to calculate the pH.

`pH+pOH=14\\\\pH=14-pOH\\\\pH=14-6\\\\pH=8`

First we have to calculate the concentration of
`H^+` ion.

`pH=-\log [H^+]`

`8=-\log [H^+]`

`[H^+]=1* 10^(-8)M`

Thus, the concentration of
`H^+` ion is,
`1* 10^(-8)M`