Revise For Test After Easter Acids And Alkalis

Question 1

What is the pH of an acid?

Answer 1

pH 1 - pH 6.

Question 2

What are ammonium salts used for?

Answer 2

Fertilisers.

Question 3

What does the symbol (aq) stand for?

Answer 3

Aqueous (dissolved in solution).

Question 4

What ions form when you add an acid to a water?

Answer 4

H+ ions.

Question 5

What salt is made when magnesium reacts with hydrochloric acid?

Answer 5

Magnesium Chloride.

Question 6

What are the products of the reaction between an acid and metal?

Answer 6

Salt and hydrogen.

Question 7

What are the products of the reaction between an acid an an alkali?

Answer 7

Salt and water.

Question 8

What is the pH of an alkali?

Answer 8

pH 8 - pH 14

Question 9

What ions are formed when a base is dissolved in water?

Answer 9

OH -ions.

Question 10

What indicator do we use to find the pH of a solution?

Answer 10

Universal indicator.

Question 11

What is precipitate?

Answer 11

An insoluble solid formed in a reaction in a solution.

Question 12

What is the symbol equation for a neutralisation reaction?11111111111z

Answer 12

H+ + OH- —> H2O

Question 13

What gas is produced when a metal reacts with an acid?

Answer 13

Hydrogen.

Question 14

What do you need to do to salt solution to get the solid salt crystals?

Answer 14

Evaporate the water.

Question 15

What do you use to tell when an acid has reacted with an alkali to produce salt?

Answer 15

An indicator.

Question 16

Name 2 ways precipitation can be used.

Answer 16

Remove pollutants.

Remove unwanted ions from drinking water.