Chemistry

Question 1

What is the rate of reaction?

Answer 1

The rate of a reaction means how quickly reactants are turned into the
products.

Question 2

What is an example of a slow reaction

Answer 2

An example of a slow reaction could be rusting

Question 3

What is an example of a slow reaction

Answer 3

An example of a fast reaction could be an explosion.

Question 4

How do you found the rate of reaction

Answer 4

Mean rate of reaction = quantity of reaction used divided by time taken or quantity of product formed divided by time taken.

Question 5

Why do things react in the first place?
Things will only react if the particles collide

Answer 5

Things will only react if the particles collide with
enough energy to cause a effective collision.

Question 6

Factors effecting the rate of a reaction

Answer 6

Temperature
The hotter the particles are, the faster they move and
therefore the frequency of successful collisions is greater.

Question 7

Factors effecting the rate of a reaction

Answer 7

Pressure and concentration
More particle in the same space means that collisions
happen with greater frequency.

Question 8

Factors effecting the rate of a reaction

Answer 8

Surface area
If there are more particles exposed to the reactants then
the frequency of successful collision is greater.

Question 9

Factors effecting the rate of a reaction

Answer 9

Catalysts
Catalysts are substances that speed up the rate of a
reaction without being used up themselves. They work by
lowering the activation energy. This is the amount of
energy needed to get a reaction going. Just like striking a
match, you need to put some energy into it, the match will
not just burst into flames by itself.

Question 10

Reversible Reactions

Answer 10

Reversible reaction are ones that will react
in both directions.