Exam 4 Review

Using solubility rules, select the compound that is least soluble in water.

• CaCl₂

• CaCO₃

• NaCl

Which of the following statements regarding a strong monoprotic acid is NOT correct?

• The acid ionizes completely in water

• The acid ionizes in water to produce hydronium ions

• HNO₂ is an example

• HCl is an example

Which of the following is a weak acid?

• HBr

• HI

• HF

• HCl

Which of the following is a strong base?

• Al(OH)₃

• NH₃

• Fe(OH)₃

• RbOH

Which of the following is the conjugate acid of the hydrogen phosphate ion, HPO₄^2– ?

• H₃PO₄

• H₂PO₄ ^–

• HPO₄^2–

• PO₄^3–

• H₃O⁺

Which one of the following is not a conjugate acid–base pair?

• NH₃ and NH₄⁺

• H₃O⁺ and OH^–

• H₂PO₄^– and HPO₄^2–

• HS^– and H₂S

Identify the base in the following acid-base reaction:

C₅H₅N (aq) + HCO₃^- (aq) → C₅H₅NH⁺ (aq) + CO₃^2- (aq) ?

• C₅H₅N (aq)

• HCO₃^- (aq)

• C₅H₅NH⁺ (aq)

• CO₃^2- (aq)

Identify the conjugate base in the following acid-base reaction:

C₅H₅N (aq) + HCO₃^- (aq) → C₅H₅NH⁺ (aq) + CO₃^2- (aq) ?

• C₅H₅N (aq)

• HCO₃^- (aq)

• C₅H₅NH⁺ (aq)

• CO₃^2- (aq)

What is the oxidation number of phosphorus in the phosphate ion?

• -5

• -3

• +3

• +5