Electrolysis

Question 1

Definition of electrolysis

Answer 1

chemical decomposition of a compound brough about by a flow of an electric current through an aqueous solution of the compound/molthen compound

Question 2

Cathode

Answer 2

Negative electrode

Reduction takes place

Ions gain electrons

definition: Electrode where reduction takes place

Question 3

Anode

Answer 3

Positive electrode

Oxidation takes place

Ions lose electrons

definition: Electrode where oxidation takes place

Question 4

Electrolyte

Answer 4

liquid or aqueous solution that contains mobile ions and can conduct electricity.

Question 5

Electrode

Answer 5

solid electrical conductor that carries electric current into the electrolyte

Question 6

Nacl just cannot win over water

Answer 6

Na 打不过 H, Cl 加强后可以打过O2

Question 7

H2O at cathode

Answer 7

2H2O+2e- = H2+ 2OH-

Question 8

H2O at anode

Answer 8

2H20 = O2+ 4H+ + 4e-

Question 9

Amount of charge is constant

Answer 9

Mole Axcharge A= Mole Bx charge B