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P^H of water is 7.0 at 25° C . If water is heated at 75°C . the P^H will be

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Decrease and the sample becomes acidic.

Increases but the sample will remains neutral.

Constant at 7.

Decreases but the sample will remain neutral.

answer is D.

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Detailed Solution

As temp increases K_w increases and thus P^H decreases but the sample is neutral

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