CHAPTER 6/7

Question 1

what is the compound that gets broken down in electrolysis

Answer 1

electrolyte

Question 2

what is the anode

Answer 2

positive electrode

Question 3

what is the cathode

Answer 3

negative electrode

Question 4

what happens in electrolysis

Answer 4

positive ions go to negative electrode

negative ions go to positive electrode

Question 5

why are substance only electrolysed in molten

Answer 5

ions are free to move around

Question 6

what is produced at the anode

Answer 6

the gas of the electrolyte

Question 7

what type of bonding is present in compounds that can be electrolysed

Answer 7

ionic

Question 8

what is a half equation

Answer 8

it shows movement of the electrons at the anodes

Question 9

in aqueous solutions what is produced at the cathode

Answer 9

charged metal ions

hydrogen

Question 10

uses of aluminium

Answer 10

pans
drink cans
foil
aeroplanes

Question 11

what is mixed with aluminium to bring its melting point down

Answer 11

cryolite

Question 12

when is hydrogen at the cathode

Answer 12

when the metal is more reactive

Question 13

what ore is aluminium found in

Answer 13

bauxite

Question 14

what is formed at the electrode

Answer 14

least reactive element

Question 15

what is the positive electrode called

Answer 15

anode

Question 16

what is the negative electrode called

Answer 16

cathode

Question 17

when is hydrogen gas formed

Answer 17

when an aqueous solution is electrolysed and the metal is more reactive

Question 18

what happens at the anode

Answer 18

oxidation loss of electrons

Question 19

what happens at the cathode

Answer 19

reduction is gain of electrons

Question 20

where do metals go

Answer 20

anode

Question 21

how is carbon used to extract metals

Answer 21

it absorbs the oxygen from the oxide and turns into co2

Question 22

when to use electrolysis

Answer 22

when the element is more reactive than carbon