IB Chem Chapter 8 Acids and Bases

What is the formula for the conjugate base of the hydrogenphosphate ion, HPO₄^2-?

• H₂PO₄^-

• H₃PO₄

• HPO₄^-

• PO₄^3-

Which are definitions of an acid according to the Bronsted-Lowry and Lewis theories?

• Bronsted-Lowry theory is a proton donor, Lewis theory is electron pair acceptor

• Bronsted-Lowry theory is a proton acceptor, Lewis theory is electron pair acceptor

• Bronsted-Lowry theory is a proton acceptor, Lewis theory is electron pair donor

• Bronsted-Lowry theory is a proton donor, Lewis theory is electron pair donor

Which species behave as Bronsted-Lowry acids in the following reversible reaction?

H₂PO₄^-(aq) + CN^-(aq) ↔ HCN(aq) + HPO₄^2-(aq)

• HCN and CN^-

• HCN and HPO₄^2-

• H₂PO₄^- and HPO₄^2-

• HCN and H₂PO₄^-

Which of the following shows the correct conjugate acid base pair?

• HCI (acid) / H₃O⁺ (conjugate base)
• HCI (acid) / CI^- (conjugate base)
• HCI (base) / CI^- (conjugate acid)
• HCI (base) / H₃O⁺ (conjugate acid)

What is the difference between a conjugate Brønsted–Lowry acid–base pair?

• Electron pair

• Positive charge

• Proton

• Hydrogen atom

Which is an example of an amphiprotic species?

• Al2O3

• CO32−

• P4O10

• HPO42−

What describes HPO42−?

• Amphiprotic but not amphoteric

• Amphoteric but not amphiprotic

• Amphiprotic and amphoteric

• Neither amphiprotic nor amphoteric

Which statement is incorrect for a 0.10 mol dm–3 HCOOH solution?

• pH = 1

• [H+] << 0.10 mol dm–3

• [HCOO–] is approximately equal to [H+]

• HCOOH is partially ionized

Which of the following gases does not result in acid deposition?

• CO2

• NO2

• NO

• SO2

How many times was Ross divorced?

• 3

• 2

• 4

• 1