Acid/Base Review

Which is a strong acid?

• 12.0M HNO₂

• 10.0M H₂SO₃

• 5.0M HI

• 5.0M HF

What is the closest pH to a solution with a [H⁺] = 2.5 x 10^-10?

• 2.5

• 3.0

• 4

• 9

The [OH^-] = 4.0 x 10^-9, what is the pH of the solution?

• 9.0

• 5.7

• 8.3

• 4.3

Which acid produces the strongest conjugate base?

• HClO₄ (Ka= 1.0 x 10⁷)

• HCN (Ka= 4.0 x 10^-10)

• H₃PO₄ (Ka= 7.5 x 10^-3)

• H₂CO₃ (Ka = 4.2 x 10^-7)

Which represents an acid with the smallest Ka value?

• HX

• HY

• HZ

When citric acid is produced by the cells of an orange and dissolves in water, it produces a relatively small number of hydronium ions. Citric acid is best described as a

• concentrated acid. 
• weak acid. 
• dilute acid.
• strong acid.

What is the pOH of a solution that has a pH of 2?

• 10
• 12
• 14
• 1

Which acid would have the smallest pH value?

• HX

• HY

• HZ

Which relationship relates Ka, Kb and Kw?

• Kw = Ka + Kb

• Kw = Kb/Ka

• Ka = Kw + Kb

• Kb = Kw/Ka

In the titration of a weak acid of unknown concentration with a standard solution of a strong base, a pH meter was used to follow the progress of the titration. Which of the following is true for this experiment?

• The [H⁺] at the equivalence point equals the ionization constant of the acid.

• The pH at the equivalence point depends on the indicator used.

• The graph of pH versus volume of base added rises gradually at first and then much more rapidly.

• The graph of pH versus volume of base added shows no sharp rise.