# Problem: In a sample of pure water at 80 °C, the pH was determined to be 6.182. What is the value of Kw at 80 °C?A. 1.00 × 10–14 B. 4.33 × 10–13 C. 2.97 × 10–14D. 5.78 × 10–7 E. 5.70 × 10–14

###### FREE Expert Solution

We’re being asked to determine the value of Kw for pure water at 80 ˚C given a pH of 6.182.

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

In a sample of pure water at 80 °C, the pH was determined to be 6.182. What is the value of Kw at 80 °C?

A. 1.00 × 10–14

B. 4.33 × 10–13

C. 2.97 × 10–14

D. 5.78 × 10–7

E. 5.70 × 10–14