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Q.

Does Ph of water varies with temperature or always 7?

Tags: ph, science, water varies
Asked by Flying Saucer, 23 Apr '13 03:40 pm
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1.

PH of water varies with temperature,it is 7.47,7.00,6.63 and 6.12 at 0 deg C,25 deg C,50 deg C and 100 deg C respectively.
Answered by amitava duttamajumdar, 23 Apr '13 06:49 pm

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2.

Totally wrong. if that was the case, when you drink hot or cold water ph would have changed and you would not have been here to ask this question?
Answered by rajesh, 23 Apr '13 03:42 pm

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3.

Varies with temperature
Answered by Quest, 24 Apr '13 11:04 am

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4.

Yes,as per BA
Answered by anil garg, 23 Apr '13 11:49 pm

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5.

Varies with temparature
Answered by rajan, 23 Apr '13 04:35 pm

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6.

PH is dependent on temperature.
Answered by Psycho, 23 Apr '13 03:51 pm

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7.

Always 7 unless mixed with some external chemical
Answered by Manoj Joshi, 23 Apr '13 03:42 pm

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8.

PH changes with changes in temperature. The famous "pH + pOH = 14" applies to the situation at 25C. That's because Kw = [H+] x [OH-] = 1.00 x 10^-14 is true at 25C.

Remember, the only factor that affects the value of an equilibrium constant is temperature. As the temperature increases, the value of Kw increases. As Kw increases, then [H+] and [OH-] increase, and the pH, which is based on [H+], decreases. (pH = -log[H+])

This is why pH meters are equipped with a temperature compensation control, which electronically cancels out the change in pH due to temperature changes.
Answered by vedprakash sharma, 23 Apr '13 03:42 pm

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9.

Ok
Answered by Saj Sierra, 23 Apr '13 03:41 pm

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