8.1 - Introduction to Acid and Bases (Important Concepts)

A Sample of pure H2O has a pH of 7.0 at any temp?

False

[H+] = [OH-] in a sample of pure water at any temperature?

True

A sample of pure H2O is neutral, in which pH = pOH

True

If the pH of a sample of pure H2O is less than 7, then the temperature of the sample must be less than 25C

False

H2O ionizes a greater extent at 50C then it does at 25C

True

As the temperature increases, the pH of pure H20 increases

True

If a sample of pure H2O has a pH or 6.8, then the pOH of pure water must be 7.2?

False

pH →[H+]

10 ^ -pH

[H+] → pH

-log [H+]

The Autoionization of water is…

Endothermic

Kw of pure water at 25C

1.00 × 10^-14

pH + pOH = ? for a neutral solution

14

[H+] > [OH-]

Acidic

[H+] < [OH-]

Basic

[H+] = [OH-]

Neutral