20 questions
Which solution A and B of equal volume and concentration mixed together to form a buffer?
Nitric acid and potassium hydroxide
Nitric acid and potassium nitrate
Propanoic acid and potassium hydroxide
Propanoic acid and potassium propanoate
When making a buffer of pH = 5, acids with the following Ka values are available. Which would be the best acid to use?
1.8 x 10-5
1.8 x 10-8
4.9 x 10-10
3.0 x 10-8
A buffer has a pH of 4.85 and contains formic acid and potassium formate. What can you conclude about the concentrations of the components of the buffer? The Ka of formic acid is 1.8 x 10-4.
Formic acid > Potassium formate
Formic acid < Potassium formate
Formic acid = Potassium formate
More information is needed to determine the relative concentrations
Suppose you have a solution of 0.3 M HBrO and 0.3 M BrO. You add a small amount of NaOH to this buffer solution. What is the reaction that takes place?
H+ + BrO- --> HBrO
OH- + H+ --> H2O
OH- + HBrO --> H2O + BrO-
OH- + BrO- --> O-2 + HBrO
A
B
C
D