The Ph of boiling water `(100^(@)C)` is 6.5625. The boiling water

Options

A. is more acidic than water `(pH=7)` at 298 K
B. is more basic than water `(pH=7)` at 298K
C. is neutral
D. none of these

Answer

C

Explanation

`K_(w)` at `100^(@)C =7.5 xx 10^(-14) mol^(2)L^(2)`
`:. [H_(3)O^(+)]=sqrt(7.5 xx 10^(-14))=2.74 xx 10^(-7) M`
`pH=-log [H_(3)O^(+)]=6.5625`
As this solution contains
`[H_(3)O^(+)]=[OH^(-)]=2.74 xx 10^(-7)M`
it is neutral