Groups And Rates Of Reaction (paper2)

Question 1

Name some properties of alkali metals

Answer 1

Conducts electricity, malleable, low melting points, soft and easy to cut

Question 2

Are alkali metals reactive?

Answer 2

Yes, very

Question 3

How does the reactivity increase in alkali metals

Answer 3

Down the group

Question 4

What is added to the alkali metals down each element

Answer 4

An electron shell

Question 5

Do alkali metals lose or gain an electron

Answer 5

Lose

Question 6

How come alkali metals are so reactive

Answer 6

The more energy levels, the weaker the attraction of the nucleus. This means the easier it is to lose the electron

Question 7

What are the group 7 elements called

Answer 7

Halogens

Question 8

How many outer electrons do halogens have

Answer 8

7

Question 9

What type of molecules are halogens

Answer 9

Diatomic

Question 10

What is the relationship between concentration and rate of reaction

Answer 10

It increases the rate of reaction as collisions occur more often because there are more particles

Question 11

What is the relationship between pressure and rate of reaction

Answer 11

It increases the rate of reaction, as particles are closer together so more effective collisions happen.

Question 12

What is the relationship between temperature and rate of reaction

Answer 12

It increases the rate of reaction, as the particles have more energy and therefore speed up. They collide more often and have enough energy to react when that happens.

Question 13

What is the relationship between surface area and rate of reaction

Answer 13

The larger the total surface area and by increasing the surface area to volume ratio, increases the rate of reaction. As there is more surface area and therefore more readily available particles to collide.

Question 14

What is the minimum amount of energy needed for a reaction to occur

Answer 14

Activation energy

Question 15

What is the ionic equation for every BAWS reaction

Answer 15

OH- + H+ -> H2O