Chemical Changes

Question 1

What is the process of electrolysis?

Answer 1

Splitting up the atom with electricity. Via using a battery to pass an current through the electrolyte.

(Negative elements attract to positive anode, to discharge/neutralise

(Positive events attract to negative cathode, to discharge/neutralise)

Then when ions are at electrodes. The negative elements are oxidised, whilst positive are reduced

Question 2

What equipment is used in electrolysis?

Answer 2

-beaker
-electrolyte
-electrode
-wire
-power supply

Question 3

What melted the boiling point to create aluminium oxide?

Answer 3

Cryolite

Question 4

What are the rules of electrolysis for electrodes?

Answer 4

-at the cathode, the elementwith the least reactivity will be discharged. Above hydrogen, discharge hydrogen, below hydrogen, metal

-at the anode, if halide present, then it is the one that gets discharged, if not present then hydroxide gets discharged

Question 5

Why do metals want to get rid of electrons?

Answer 5

So they can become positively formed ions

Question 6

What group is most reactive with metals?

Answer 6

Group 1

Question 7

List the reactivity series??

Answer 7

Potassium
Sodium
Lithium
Calcium
Magnesium
Carbon
Zinc
Iron
Hydrogen
Copper

Question 8

Do reactions get more violently reactive as you move up the reactivity series

Answer 8

Yes

Question 9

What happens when a metal reacts with an acid?

Answer 9

Salt and hydrogen is formed

Question 10

What happens when a metal reacts with water?

Answer 10

Metal hydroxide and hydrogen is formed

Question 11

What occurs in a metal displacement reaction?

Answer 11

The more reactive metal displaces the less reactive metal

Question 12

What is oxidation?

Answer 12

The process of gaining oxygen.

Metal + oxygen -> metal oxide

Question 13

What is reduction?

Answer 13

The loss of oxygen

Metal oxide -> metal+ oxygen

Question 14

What happen when iron reacts with oxygen?

Answer 14

It oxidizes and the iron starts to rust

Question 15

How do you extract an oar to create a pure metal?

Answer 15

Use the process of reduction. Use carbon for metals like, zinc, iron and copper; so carbon can displace them from there oxygen to form pure metal

(Other method is electrolysis) [which is expensive]

Question 16

Is oxidation the loss or gain of electrons?

Answer 16

Loss of electrons

Question 17

Is reduction the gain or lose of electrons?

Answer 17

Gain of electrons

Question 18

What does oOILRIG stand for?

Answer 18

Oxidation
Is
Loss
Reduction
Is
Gain

Question 19

What can a displacement reaction be reformed into?

Answer 19

An ionic equation?

Question 20

What is an ionic equation?

Answer 20

Only shows particles that take part in the reaction. That change in some way

E.x.p Ca + f(2+) -> Ca(2+) + Fe

Question 21

What are individual half equations?

Answer 21

Only involve gain and loss of electrons

Ca-> Ca(2+) + 2e(-)

Fe(2+) + 2e(-) -> Fe

Question 22

What are spectator ions?

Answer 22

Ions that do not take part in a reaction. So it is kept the same

Question 23

Why can’t ions be electrolyzed?

Answer 23

Ions not free to move