IB Chemistry Chapter 8 Acids and Bases SL

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 Acid is a proton donor, Lewis Acid is electron pair acceptor

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

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

• Bronsted-Lowry Acid is a proton donor, Lewis Acid 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

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 mezthanoic Acid HCOOH solution?

• pH = 1

• [H⁺] < 0.10 mol dm^-3

• [HCOO^-] is approximately equal to [H⁺]

• HCOOH is only partially dissociated

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

• CO₂

• NO₂

• NO

• SO₂

Tags

NGSS.HS-PS1-2

50cm³ HCl has a pH of 4. What is the final pH if the solution is made up to 500cm³ if 450cm³ of water is added to it?

• 3

• 4

• 5

• 6

Which of the following can act as a Lewis Acid but not a Bronsted Lowy Acid?

• BF₃

• PCl₃

• H₂O

• NH₃