# Problem: At 0 degrees C, the ion product constant of water is 1.2x10 –15. The pH of pure water at this temperature is:6.887.007.467.56

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###### FREE Expert Solution

We’re being asked to determine the pH of pure water at 0 ˚C, given a Kw of 1.2 × 10–15.

Recall that Kw is the autoionization constant of water, and is given by:

$\overline{){{\mathbf{K}}}_{{\mathbf{w}}}{\mathbf{=}}\left[{\mathbf{H}}^{\mathbf{+}}\right]\left[{\mathbf{OH}}^{\mathbf{-}}\right]}$ ###### Problem Details

At 0 degrees C, the ion product constant of water is 1.2x10 –15. The pH of pure water at this temperature is:

1. 6.88
2. 7.00
3. 7.46
4. 7.56

What scientific concept do you need to know in order to solve this problem?

Our tutors have indicated that to solve this problem you will need to apply the Ka and Kb concept. You can view video lessons to learn Ka and Kb. Or if you need more Ka and Kb practice, you can also practice Ka and Kb practice problems.

What is the difficulty of this problem?

Our tutors rated the difficulty ofAt 0 degrees C, the ion product constant of water is 1.2x10 ...as medium difficulty.

How long does this problem take to solve?

Our expert Chemistry tutor, Jules took 2 minutes and 39 seconds to solve this problem. You can follow their steps in the video explanation above.

What professor is this problem relevant for?

Based on our data, we think this problem is relevant for Professor Duim's class at UCD.