20.1 - Bronsted-Lowry Acid & Bases

Question 1

Define:

Bronsted-Lowry acid

Bronsted-Lowry base

Answer 1

Bronsted-Lowry acid

Proton donor

Bronsted-Lowry base

Proton acceptor

Question 2

What is the Arrhenius model of acids and bases?

Answer 2

• Acids dissociate & release H⁺ ions into aq solution
• Alkais dissociate and release OH^- ions into aq solution

H⁺ + OH^- > H₂O

• An alkali is a soluble base

Question 3

What is a conjugate acid base pair?

Give an example

Answer 3

2 species which can be interconverted by the transfer of a proton

HCl and Cl^- are known as conjugate acid base pairs

In the forward reaction, HCl releases a proton to form its conjugate base, Cl^-

In the reverse, Cl^- accepts a proton to form its conjugate acid HCl.

Question 4

What is the hydronium ion?

Answer 4

H₃O⁺_(aq)

• In (aq) dissociation,a proton must be transferred from acid to base in the presence of water
• Water accepts a proton to become its conjugate base (hydronium ion)

Question 5

What are the different neutralisation reactions?

Answer 5

Question 6

What is a:

monobasic

dibasic

& tribasic

acid?

Answer 6

Each term refers to the number of hydrogen in the acid that can be replaced per molecule

E.g. boric acid, H₃BO₃ is tribasic