1.

Calculate the pOH of a solution at 25^@C that contains 1 xx 10^(-10) M of hydronium ions, i.e. H_3O^+.

Answer»

`4.000`
`9.0000`
`1.000`
`7.000`

Solution :Given `[H_3O^+]=1xx10^(-10)` M
At `25^@ C [H_3O^+][OH^-]=10^(-14)`
`THEREFORE [OH^-]=10^(-14)/10^(-10)=10^(-4)`
Now, `[OH^-]=10^(-p^"OH") =10^(-p^"OH")`
`therefore` pOH=4


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