What is the pH at 25 degrees Celsius of a 0.0064 M solution of a weak base with a Kb of 1.6E-9?
1 Answer
Mar 8, 2018
pH = 8.5
Explanation:
A weak base in water steals a proton off water to make hydroxide ion, and from this you can get your pH.
B: + H20 = BH + OH-
I 0.0064M 0 0
C -x +x +x
E 0.0064M +x +x
employ the x<<0.0064M assumption to avoid quadratic, then check at end to make sure it is less than 5%