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pH of water at 24°c is 7. What effect does increase in temperature results in pH of water?1)pH will be more than 72) pH will be less than 73) pH will be equal to 74) can't be determined

pH of water at 24°c is 7. What effect does increase in temperature results in pH of water?

1)pH will be more than 7

2) pH will be less than 7

3) pH will be equal to 7

4) can't be determined

Option 2 is correct ans .

Dissociation of water is an endothermic  reversible reaction.

When temperature is increased , for an endothermic reaction in equilibrium , it shifts the equilibrium to forward direction i.e. more product is formed which in this case means : more water is dissociated ( more H+  concentration ) is obtained . Ph= negative logarithm of H+ concentration so, more H+ concentration means, lesser Ph. so , whole ph range gets changed when temperature is increased i.e at that time, our neutral point is lesser than 7 but, still water is neutral !

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