Théorie des acides et des bases

Question 1

What does the Arrhenius Theory of acids and bases state?

Answer 1

• Acid is a hydrogen-contain substance that ionises, release H+ ions in aq sol n
• Base is a hydroxide-contain substance that ionises, release OH- ions in aq sol n

Question 2

What does Bronsted-Lowry theory of acids and bases state

Answer 2

• Bronsted acid is proton donor; species must hv a H atom that can b lost
• Bronsted base is proton acceptor; species must hv lone pair of e- to form dative bond w H atom (proton)

Question 3

If HA (acid) reacts with B (base), what is the equation, and what are the conjugate base/acid that form?

Answer 3

rxn: HA + B ⇌ A- + HB+

A- is conjugate base of HA,
HB+ is conjugate acid of B

Question 4

What does Lewis Theory of acids and bases state?

Answer 4

• Lewis acid is substance that can accept pair of e- fr base to form dative bond; e- pair acceptor
• Lewis base is substance that can donate pair of e- to acid to form dative bond; e-pair donor