Problem: At 0°C the ion product constant of water,  Kw, is 1.2 x 10–15. The pH of pure water at this temperature is(A) 6.88(B) 7.00(C) 7.46(D) 7.56

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FREE Expert Solution

We’re being asked to calculate for the pH of water at 0°C.

Recall that Kw is temperature dependent, therefore the pH of water is not equal to 7 at 0°C.


The pH and pOH of a compound determine its acidity and basicity.

• pH

▪ pH stands for the negative logarithmic function of hydronium ion concentration
can be calculated using the following equation:

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Problem Details

At 0°C the ion product constant of water,  Kw, is 1.2 x 10–15. The pH of pure water at this temperature is

(A) 6.88

(B) 7.00

(C) 7.46

(D) 7.56

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