Question 1
Normal rainfall has a concentration of OH
- that is 3.99
× 10
-9. The concentration of H
3O
+ in normal rainfall is
◦ less than 3.99
× 10
-9, and the rain is acidic.
◦ greater than 3.99
× 10
-9, and the rain is acidic.
◦ less than 3.99
× 10
-9, and the rain is basic.
◦ greater than 3.99
× 10
-9, and the rain is basic.
Question 2
Calculate the pH for an aqueous solution of acetic acid that contains

hydronium ion.
◦ 2.41 × 10
-12 M
◦ 11.62
◦ 2.38
◦ 4.15 × 10
-3 M