Unit 8 AP Chemistry

Which is an acid-base conjugate pair?

• H₃O⁺ / OH^–

• H₂SO₄ / SO₄^2–

• CH₃COOH / H₃O⁺

• CH₃NH₃⁺ / CH₃NH₂

Which of the following is correct?

• A weak acid is a proton donor and its aqueous solution shows good conductivity.

• A weak acid is a proton donor and its aqueous solution shows poor conductivity.

• A weak acid is a proton acceptor and its aqueous solution shows good conductivity.

• A weak acid is a proton acceptor and its aqueous solution shows poor conductivity.

Which species acts as a Lewis and Brønsted–Lowry base?

• [Al(H₂O)₆]³⁺

• BF₃

• NH₄⁺

• OH⁻

Which species behave as Brønsted–Lowry bases in the following reaction? H₂SO₄ + HNO₃ H₂NO₃⁺ + HSO₄^-

• HNO₃ and HSO₄^-

• HNO₃ and H₂NO₃⁺

• H₂SO₄ and HSO₄^-

• H₂NO₃⁺ and HSO₄^-

Which of the following is an example of a Lewis acid–base reaction, but not a Brønsted–Lowry acid–base reaction?

• 2CrO₂⁻⁴(aq) + 2H⁺(aq) →

  Cr₂O₂⁻⁷(aq) + H₂O(l)

• Co(H₂O)₂⁺⁶(aq) + 4HCl(aq) →

  CoCl₂⁻⁴(aq) + 4H⁺(aq) + 6H₂O(l)

• NH³(aq) + H⁺(aq) →

  NH⁺⁴(aq)

• CH3COO⁻(aq) + H2O(l) →

  CH3COOH(aq) + OH⁻(aq)

Which row correctly describes moldm⁻³ NaOH(aq)?

• A

• B

• C

• D

Tags

NGSS.HS-PS2-5

What is the Brønsted–Lowry conjugate base of H₂PO⁻⁴?

• H₃PO₄

• HPO₂⁻⁴

• PO3⁻⁴

• HO⁻

Which descriptions are correct for both a Brønsted–Lowry acid and a Lewis acid?

• A

• B

• C

• D

Consider the equilibrium below.
CH₃CH₂COOH(aq) + H₂O(l) ⇌ CH₃CH₂COO⁻(aq) + H₃O⁺(aq)

Which species represent a conjugate acid-base pair?

• CH₃CH₂COOH and H₂O

• H₂O and CH₃CH₂COO⁻

• H₃O⁺ and H₂O

• CH₃CH₂COO⁻ and H₃O⁺

What is the conjugate base of H₂CO₃ according to the Brønsted-Lowry theory?

• CO₃²⁻

• HCO₃⁻

• H₃CO₃⁺

• CO₂