Electrolysis

Question 1

Definition of electrolysis

Answer 1

The process of using electricity to break down or decompose a compound

Question 2

Anode

Answer 2

Connected to the positive terminal

Receives anions

Question 3

Cathode

Answer 3

Connected to the negative terminal

Receives cations

Question 4

Inert electrodes

Answer 4

Carbon (graphite)

Platinum

Question 5

Selective discharge of anions

Answer 5

Sulfate (never)
Nitrate (never)
Chloride (conc)
Bromide (conc)
Iodide (conc)
Hydroxide

Question 6

Selective discharge of cations

Answer 6

Reactivity series
K
Na
Ca
Mg
Al
Zn
Ni (conc)
Pb (conc)
H
Cu
Ag

Question 7

Redox in electrolysis

Answer 7

RED CAT

AN OX

Question 8

What affects the selective discharge of ions during electrolysis?

Answer 8

1. Position of ion in the electrochemical series

2. Concentration of ions

Question 9

Discharge of ions

Answer 9

When an ion loses its charge

Question 10

Uses of electroplating chromium

Answer 10

Bicycle parts

Question 11

Uses of electroplating tin

Answer 11

Tin cans

Question 12

Uses of electroplating silver

Answer 12

Silver cutlery

Question 13

Uses of electroplating nickel

Answer 13

Corrosion-resistant layer before electroplating with another metal on top

Question 14

Electrolysis: Exothermic/Endothermic?

Answer 14

Endothermic

Question 15

Simple cell: Exothermic/Endothermic?

Answer 15

Exothermic

Question 16

Anode/Cathode in simple cell

Answer 16

Anode: More reactive metal
Cathode: Less reactive metal

Question 17

How to increase voltage of simple cell?

Answer 17

Use metals with greater difference in reactivity