ENCE 433 Dr. Alba Torrents

ENVIRONMENTAL ENGINEERING ANALYSIS Fall 1996

Homework Set #6 SOLUTION

SOLUBILITY

1.

b) The solid phase controls the dissolved concentration of Cd⁺²

c) At pH = 10

2.

1. the pH will increase due to the formation of OH^-
2. Common ion effect, [Ag⁺] will decrease
3. Common ion effect or pH increased, [Ni⁺²] will decrease unless there is the formation of Ni(OH)^-x_n
4. The solubility is the same

3.

If pH decreases, [OH^-] decreases and thus [Fe⁺²] will increase as K_so is constant.

At pH = 5.00 ===> [H⁺] = 10^-5 M ===> [OH^-] = 10^-9 M