Electrolysis

Question 0

What are electrolytes?

Answer 0

The liquid that conducts electricity

Question 1

What is electrolysis?

Answer 1

Electrolysis is when you pass an electric current through an ionic substance that is molten or in solution and breaking it up forming 2 new substances

Using electricity to break up an ionic compound

Question 2

Why does the ionic substance have to be molten or in solution in electrolysis?

Answer 2

So they can carry a charge as there are free ions

Question 3

Will a current flow through an ionic compound that’s solid?

Answer 3

No

Question 4

If the electrolyte is a non electrolyte will current flow?

Answer 4

No

Question 5

Is the anode positive or negative electrode?

Answer 5

P
A
N
I
C

Anode is positive

Question 6

Is the cathode the negative or positive electrode?

Answer 6

P
A
N
I
C

Cathode is negative

Question 7

What’s are cations in electrolysis?

Answer 7

Positive ions which are attracted to the cathode which is negative

Question 8

What are anions in electrolysis?

Answer 8

Anions are negative ions which are attracted to the anode which is positive electrode

Question 9

Why can’t covalent substance conduct electricity?

Answer 9

Because there are no free ions to carry a charge in covalent substance

Question 10

What does panic stand for?

Answer 10

Positive
Anode
Negative
Is 
Cathode

Question 11

When electrons are taken from the anode (positive) they are given to the?

Answer 11

Cathode (negative)

Question 12

Electrolysis of lead bromide

Where is lead produced and where is bromine produced?

Answer 12

Lead is produced at the cathode

Bromine is produced at the anode

Question 13

In the electrolysis of lead bromide what is the electrolyte?

Answer 13

Molten lead bromide

Question 14

What is the half equation for the cathode in the electrolysis of lead bromide?

Answer 14

Pb 2+ + 2e- ——> Pb

Question 15

What is the half equation for the anode in the electrolysis of lead bromide?

Answer 15

2Br- ——> Br2 +2e-

Question 16

If electrolysis happens in aqueous solution what extra ions will there be?

Answer 16

H+ ions and OH- ions

Question 17

In electrolysis in aqueous solution what is produced at the cathode?

Answer 17

H+ ions and metal ions are present

Hydrogen will be formed if the metal is more reactive but a solid metal layer will be produced if the metal is less reactive than the H+ ions

Question 18

In electrolysis in aqueous solution what is produced at the anode?

Answer 18

OH- ions and if halide ions are present then they are produced. If no halide ions oxygen is produced

Question 19

What ions are there in sulphuric acid?

Answer 19

2-
SO Ions
4

       \+ And H     Ions 

          -  And OH     Ions

Question 20

What is produced at the cathode in the electrolysis of sulphuric acid?

Answer 20

H+ ions

Hydrogen is produced

Question 21

What is the half equation at the cathode for sulfuric acid?

Answer 21

2H+ + 2e- —–>H2

Question 22

Do hydroxide ions lose electrons more easily or less easily than sulphate ions in the electrolysis of sulfuric acid?

Answer 22

Hydroxide lose electrons more easily than sulphate ions

Question 23

What is produced at the anode in the electrolysis of sulfuric acid?

Answer 23

Oxygen and water

Oxygen is produced because there are no halide ions

Question 24

What ions are in sodium chloride?

Answer 24

Na+ Cl- H+ And OH-

Question 25

What is produced at the anode and cathode in the electrolysis of sulfuric acid?

Answer 25

anode- oxygen | Cathode -hydrogen

Question 26

Do hydrogen ions accept electrons more easily or less easily than sodium ions in the electrolysis of sodium chloride?

Answer 26

More easily | Hydrogen more reactive than sodium

Question 27

What is produced at the cathode in the electrolysis of sodium chloride?

Answer 27

Hydrogen gas is produced | H+ ions

Question 28

What is the half equation at the cathode in the electrolysis of sodium chloride?

Answer 28

2H+ + 2e- ------> H2

Question 29

Do chlorine ions lose electrons more easily or less easily than hydroxide ions in the electrolysis of sodium chloride?

Answer 29

More easily Chlorine in more reactive

Question 30

What is produced at the anode in the electrolysis of sodium ?

Answer 30

Chlorine gas | Cl-

Question 31

What is the half equation for the anode in the electrolysis of sodium chloride?

Answer 31

2Cl- ------>Cl2- + 2e-

Question 32

What ions does copper sulphate contain?

Answer 32

Cu2+ ions 2- So4 Ions H+ ions OH- ions

Question 33

Does hydrogen lose electrons more or less easily than copper in the electrolysis of copper sulfate?

Answer 33

Less easily Copper loses them more easily

Question 34

What is produced at the cathode in the electrolysis of copper sulfate?

Answer 34

Pure copper metal

Question 35

What is the half equation for the cathode in the electrolysis of copper sulfate?

Answer 35

Cu2+ + 2e- -----> Cu

Question 36

Do hydroxide ions lose electrons more easily or less easily than sulfate ions in the electrolysis of copper sulfate?

Answer 36

More easily

Question 37

What is produced at the anode in the electrolysis of copper sulfate?

Answer 37

Oxygen and water OH- ions

Question 38

What is the half equation for anode in the electrolysis of copper sulfate?

Answer 38

4OH- ------> O2 + 2H2O + 4e-

Question 39

What is produced at the Anode and cathode in the electrolysis of sodium chloride?

Answer 39

Anode- chlorine | Cathode - hydrogen

Question 40

What is produced at the anode and cathode in the electrolysis of copper sulfate?

Answer 40

Anode- oxygen | Cathode - copper