Question

Suppose a nanotechnological innovation allows every single charged ion to be precisely identified and removed from a small volume of water. Which of the following describes Ka for the water at the end of the process, assuming that the filtered water is given adequate time to re-equilibrate?
A. 0.
B. 1.
C. 10^-7.
D. 10^-14.

Answer 1

Answer:

C. 10^-7.

Explanation:

Hello,

By taking into account that the eventual added ion to the water is removed, it means that after the time goes by, to water will remain pure, so one knows that it implies a pH of 7. Such pH is related with a Ka of 10^-7 based on the mathematical description of pH:

$pH=-log([H^+])$

As long as $[H^+]$ matches with Ka, it turns out into:

$Ka=10^{-pH}=10^{-7}$

Best regards.