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pH of water is 7.0 at 25^(@)C. If water ...

`pH` of water is `7.0` at `25^(@)C`. If water is heated to `70^(@)C`, the:

A

`pH` will decrease and solution becomes acidic

B

`pH` will increase

C

`pH` will remain constant as `7`

D

`pH` will decrease but solution will be neutral

Text Solution

Verified by Experts

The correct Answer is:
D
On heating water `K_(w)` increases and thus `pH` scale for neutrality changes from `7` to some lower value, i.e, `6.8` or `6.9` depending upon `K_(w)` values.
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Knowledge Check

  • pH of water is 7.0 at 25^(@)C . If water is heated to 80^(@)C

    A
    pH will increase
    B
    pH will decrease
    C
    pH remains 7.0
    D
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  • pH of water is 7 so it is

    A
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    D
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    A
    pH will decrease and the sample becomes acidic
    B
    pH will increase but the sample will remain neutral
    C
    pH will remain constant as 7.
    D
    pH will decrease but the sample will remain neutral.

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