Electrolysis

Question 1

Explain electrode

Answer 1

A conductor in which electricity enters and leaves

Question 2

Cathode

Answer 2

Negatively charged electrode

Question 3

Anode

Answer 3

Positively charged electrode

Question 4

Electrolyte

Answer 4

A liquid which contains ions and can be decomposed by electrolysis

Question 5

Why is dc not ac used in electrolysis

Answer 5

Cathode and anode are constantly switching places

Question 6

What happens at electrolysis at the cathode

Answer 6

Cations receive electrons (reduction) to change an atom or moldecule

Question 7

What happens in anode

Answer 7

The anions lose electrons to form atoms or molecules

Oxidation

Question 8

Outline electrolysis of brine (NaCl)

And equation

Answer 8

Large scale process used to manufacture chlorine from salt.
Anode 2cl- + 2e > cl2

2H+ + 2e > H2 reduction

Question 9

Electrolysis of electroplating using copper sulfate

Answer 9

Plated connects to negative terminal of power supply.
Cooper connected to + terminal
Electrolyte is coppersulfate solution
Purify copper during manufacture.