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Yellow colour of chromates changes to or...

Yellow colour of chromates changes to orange on acidification due to formation of:

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)`

Text Solution

Verified by Experts

The correct Answer is:
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)`
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