Question

Which relation is wrong
A. `10^(-pH)+10^(-pOH)=10^(-14)`
B. `pH alpha(1)/([H^(+)])`
C. `K_(w) prop T`
D. dissociation constant of water `K=1.8 xx 10^(-16)`

Answer 1

Correct Answer - 1
`(1)" " 10^(-pH)xx10^(-pOH)=10^(-Kw)`
`(2)" "`as `[H^(+)]` increases, pH decreases,
`(3)` since ionization of water is endothermic in nature hence increase in temperature increases `K_(w)`.
`(4)" "K_(a)` of `H_(2)O=([H^(+)][OH^(-)])/([H_(2)O])=(10^(-14))/(55.55)=1.8xx10^(-16)`
`10^(-pH)xx10^(-pOH)=10^(-Kw)`