C6 Rates Of Reaction

Question 1

Name two slow reactions.

Answer 1

The rusting of iron.

Chemical weathering – like acid rain damage to limestone buildings.

Question 2

Name a moderate speed reaction.

Answer 2

A metal, such as magnesium, reacting with acid to produce a gentle stream of bubbles

Question 3

Name two fast reactions

Answer 3

Burning, and explosions which are even faster and release a lot of gas. Explosive reactions are all over in a fraction of a second.

Question 4

Why does safety need to be taken into account when deciding on the rate of reaction?

Answer 4

If the reaction is too fast it could cause an explosion, which can be dangerous.

Question 5

Why do economic reasons need to be taken into account with the rate of reaction?

Answer 5

Changing conditions can be costly, with a high temperature this would result in higher fuel bills, so the costs of production are pushed up. If a faster rate is used more product will be produced in less time. Companies often have to choose optimum conditions that give low production costs, this may mean compromising on the rate of production or the yield.

Question 6

What other issues are there ?

Answer 6

Poisonous gases and how dangerous the reactions are.