Electrolysis YEAR 11

Question 1

Electrolyte

Answer 1

A liquid which is able to conduct electricity via free moving ions

Question 2

Define electrolysis

Answer 2

electricity from a direct current decomposes electrolytes

Question 3

cations are ___ ions

Answer 3

METAL

Question 4

cations move to the ______ode

Answer 4

CATHODE

Question 5

Anions are _________ ions

Answer 5

NON METAL

Question 6

Anions move to the _____ode

Answer 6

ANODE

Question 7

Anode is the

Answer 7

Positive electrode

Question 8

Cathode is

Answer 8

Negative electrode

Question 9

Oxidation happens at the

Answer 9

Anode

Question 10

Reduction happens at the

Answer 10

Cathode

Question 11

Define electroplating

Answer 11

uses electrolysis to put a thin layer of a metal onto a metal object

Question 12

How does electroplating (electrolysis to make copper plating) work

Answer 12

Copper is put as anode
The object to be plated is put as the cathode
Both are placed into electrolyte
At Anode copper atoms lose electrons to form copper ions which dissolve into electrolyte
At cathode, copper ions for copper atoms in the surface

Question 13

How do the masses of each electrode change in electrolysis

Answer 13

The cathode increases in mass while the anode decreases