Question 1
A 7.0 × 10
-3 mol L
-1 aqueous solution of Ca(OH)
2 at 25.0 °C has a pH of:
◦ 12.15
◦ 1.85
◦ 1.4 × 10
-2◦ 7.1 × 10
-13◦ 11.85
Question 2
A certain acid, HA, has a
Ka given by:
HA + H
2O
H
3O
+ + A
-Ka = 6.80 × 10
-6
What is the pH of a 0.247 M aqueous solution of the acid's potassium salt, KA, which undergoes the hydrolysis reaction?
A
- + H
2O
OH
- + HA
◦ 4.72
◦ 9.28
◦ 4.11
◦ 9.89
◦ 9.44