C6

Question 1

what ions do acids release in solution?

Answer 1

Hydrogen ions (H^+)

Question 2

What ions do alkalis release in solution?

Answer 2

Hydroxide ions (OH^-)

Question 3

what is electrolysis?

Answer 3

using electricity to breakdown compounds

Question 4

positive electrode

Answer 4

anode

Question 5

negative electrode

Answer 5

cathode

Question 6

what current does electrolysis require

Answer 6

direct current (DC)

Question 7

what is the substance that is broken down during electrolysis?

Answer 7

electrolyte

Question 8

what compound is the electrolyte

Answer 8

ionic compound

Question 9

what has to happen to an ionic compound to make it able to conduct electricity

Answer 9

has to be molten, or dissolved in water, so the ions are free to move

Question 10

anions

Answer 10

negative ions, attracted to anodes

Question 11

cations

Answer 11

positive ions, attracted to cathodes

Question 12

what charge are the metal ions in an ionic compound

Answer 12

metals lose electrons and become positive

Question 13

what substances form negative ions?

Answer 13

non-metals gain electrons and form negative ions

Question 14

why is electrolysis used to extract aluminium from aluminium oxide?

Answer 14

aluminium is more reactive than carbon

Question 15

why does the anode need replacing during the electrolysis of aluminium oxide?

Answer 15

it reacts with oxygen to form carbon dioxide

Question 16

what negative ions does water produce?

Answer 16

OH-

Question 17

what positive ions does water produce

Answer 17

H+

Question 18

what could form at the cathode during the electrolysis of an ionic solution?

Answer 18

metal or hydrogen

Question 19

what could form at the anode during the electrolysis of an ionic solution?

Answer 19

non-metal ion or oxygen

Question 20

what is made at the anode when there is no halide ion?

Answer 20

oxygen