Chapter 8

Question 1

What does the word “reactants” mean

Answer 1

the substances that react together

Question 2

What does the word “products” mean in terms of chemical reaction

Answer 2

The new substances made in the reaction

Question 3

iron + sulfur—-> iron sulfide

which are the reactants and which are the products in this chemical reaction?

Answer 3

reactants:
iron
sulfur

products:
iron sulfide

Question 4

Is burning a chemical reaction?

Answer 4

Yes it is

Question 5

What is neutralisation

Answer 5

When acids and alkalis are mixed to cancel each other out and make a neutral solution

Question 6

What equipment can we use to add the universal indicator accurately

Answer 6

the burette

Question 7

give an example of chemical reaction that produces a neutral substance

Answer 7

Hydrochloric acid + Sodium Hydroxide —–> Sodium Chloride + Water

Question 8

When your stomach produces too much acid, which leads to indigestion. What type of medicines can help

Answer 8

Medicines that are alkalis and that can neutralise the acid. These medicines are called antacids

Question 9

There are bacterias in our mouth that produces acid when they feed. This can damage our teeth and make them decay. How can toothpaste help?

Answer 9

Toothpaste contains alkali and this helps to neutralise the acid.