Electrolysis and half equations

Question 1

What ions are attracted to the cathode and anode in molten copper chloride

Answer 1

cathode - copper, anode - chlorine

Question 2

What ions are attracted to the cathode and anode in dissolved (aqueous) sodium chloride

Answer 2

cathode - hydrogen, anode - chlorine

Question 3

Oxidation means

Answer 3

electrons are lost

Question 4

Reduction means

Answer 4

electrons are gained

Question 5

Why is hydrogen sometimes discharged at the cathode

Answer 5

when hydrogen is less reactive than the metal

Question 6

Why is oxygen sometimes discharged at the anode

Answer 6

when hydroxide is less reactive than the non-metal

Question 7

Why does the ionic compound need to be molten or dissolved

Answer 7

so the ions are free to move and carry a charge

Question 8

Electrolyte definition

Answer 8

ionic melt or aqueous solution

Question 9

Anode reactivity scale (least to most)

Answer 9

-ide, OH-, -ate

Question 10

Where does oxidation occur

Answer 10

anode

Question 11

Where does reduction occur

Answer 11

cathode

Question 12

2Cl^- - 2e^- -> Cl2 (half equation example)

Question 13

2H^+ + 2e^- -> H2 (half equation example)