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pH of water is 7.0 at 25°C. If water is heated to 70°C A) pH will decrease and solution becomes acidic.B) pH will increaseC) pH will remain constant as 7 D) pH will decrease but solution will be neutral |
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Answer» (D) pH will decrease but solution will be neutral On heating, the extent of dissociation of water increases which leads to the increase in concentration of H+ ions as well as OH- ions. Hence the pH of water decreases, but due to the equal number of H+ and OH- ions, water remain neutral. |
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