4.4.6: Buffer Action

Question 1

Buffer

Answer 1

A solution that resists changes in pH when small amounts of acid or alkali are added.

Question 2

Two types of buffer

Answer 2

acidic buffer and basic buffer

Question 3

Acidic buffers

Answer 3

Have a pH of less than 7, contain a mixture of weak acid with one of its salts.

Question 4

Basic buffers

Answer 4

Have a pH of more than 7, contain a mixture of weak with one of its salts

Question 5

Both acidic and basic buffers can

Answer 5

Can resist a change in pH whether an acid or a base is added to the solution

Question 6

Dilution effect on buffers

Answer 6

Acidic and basic buffers can also resist changes in pH when diluted by water.

Question 7

Example of an acidic buffer

Answer 7

mixture of ethanoic acid and sodium ethanoate

Question 8

Example of a basic buffer

Answer 8

solution of ammonia and ammonium chloride

Question 9

Examples of uses of buffers

3

Answer 9

in shampoo
biological washing powder
biological buffer systems in our bodies