Author Question: Hydrogen ion activity can be expressed as which of the following? a. pH = log10H c. pH = log10H+ ... (Read 23 times)

silviawilliams41 · **on:** Jul 16, 2018

Hydrogen ion activity can be expressed as which of the following?

a. pH = log10H c. pH = log10H+
b. H+ = log 10 d. pH = 1 107 mol/L

Question 2

Acid-base neutrality is expressed as which of the following? 1. pH = 14 2. pH < 7.0 3. pH = 7.0 4. H+ > OH 5. H+ = OH

a. 1 c. 2 and 4
b. 3 and 5 d. 1 and 4

ultraflyy23 · **Reply #1 on:** Jul 16, 2018

Answer to Question 1

ANS: C
Sorenson introduced the term pH as a shorthand way to express the hydrogen ion activity of so-lutions. It is defined as the negative logarithm (base 10) of the hydrogen ion concentration, or pH = log10H+.

Answer to Question 2

ANS: B
In general chemistry textbooks, a pH of 7 represents universal neutrality, where the concentration of hydrogen ions (1 107 mol/L) and hydroxyl ions (1 107 mol/L) is equal. This is the pH of pure water.