8.1 Bronsted Lowry Acids And Bases

Question 1

What is Bronsted Lowry acid?

Answer 1

A proton H+ donor.

Question 2

What is Bronsted Lowry base?

Answer 2

A proton H+ acceptor.

Question 3

What is a conjugated acid base pair?

Answer 3

A pair of species that differ by 1 proton (H+)

Question 4

What is important about the reaction of ethanoic acid with water:
CH3COOH + H20 CH2COO- + H3O+

Answer 4

In the forward direction the CH3COOH donates a proton (H+) to the H2O, the Ch3COOH is an acid as it donates a proton, the H2O accepts a proton and therefore acts as a base.
In the reverse direction H30+ acts as an acid because it donates a proton to CH3COO- which accepts a proton and is a base.

Question 5

In the above reaction what is the conjugate acid base pair?

Answer 5

CH3COOH acts as an acid and donates a proton to form its conjugate base CH3COO- and therefore CH3COOH and CH3COO- differ by 1H+ and represent a conjugate acid base pair. H20 and H3O+ are also a conjugate aid base pair.

Question 6

What is amphiprotic?

Answer 6

A species that can donate a proton acting as an acid or accept a proton acting as a base.

Question 7

What is amphoteric?

Answer 7

Any substance that can act as both an acid and a base.