Strong Acids And Weak Acids

Question 1

What do acids produce

Answer 1

They ionise in aqueous solutions

Produce hydrogen ions H+

Question 2

What is a strong acid

Answer 2

Ionise completely in water, all acid particles dissociate to release H+ ions
Eg: sulfuric, hydrochloric, nitric acids

Question 3

What is a weak acid

Answer 3

Do not fully ionise in solution, only a small proportion of acid particles dissociate to release H+ ions
Eg: ethanoic, citric, carbonic acid

Question 4

What is the pH of an acid or alkali a measure of

Answer 4

The concentration of H+ ions

Question 5

How much does the concentration of H+ ions increase by for every decrease of 1 on the pH scale

Answer 5

Increases by a factor of 10

Question 6

How much does the concentration of H+ ions increase by for every decrease of 2 on the pH scale

Answer 6

Factor of 100

Question 7

What is the rule for working out how much a H+ ion concentration changes by

Answer 7

Factor H+ ion concentration changes by = 10 power of (-x)

Question 8

What is acid strength

Answer 8

Tells you what proportion of the acid molecules ionise in water

Question 9

What is acid concentration

Answer 9

Concentration measures how much acid there is in a certain volume of water

Question 10

If you have a dilute but strong acid what happens to the pH

Answer 10

pH will decrease with increasing acid concentration