electrochemistry

Question 1

define electrolysis

Answer 1

decomposition of an ionic compound when molten or in an aquoes solution by the passage of an electric current

Question 2

what is the anode

Answer 2

the positive electrode in which the anions (negative ions) are attracted towards

Question 3

what is the cathode

Answer 3

the negative electrode in which the cations (positive ions) are attracted towards

Question 4

what is the electrolyte

Answer 4

the molten or aqueos substance that undergoes electrolysis

Question 5

what are the products and observations of electrolysis of sodium chloride

Answer 5

formed at anode- chlorine
formed at cathode- hydrogen

Question 6

what are the products and if any observation of the electrolysis of molten lead bromide

Answer 6

formed at anode- bromine (orange-red)
formed at cathode- lead (grey/silver)

Question 7

what are the products and if any observation of the electrolysis of sulfuric acid

Answer 7

cathode- hydrogen
anode- oxygen

Question 8

where are metals or hydrogen formed

Answer 8

cathode

Question 9

where are non metals other then hydrogen formed

Answer 9

anode

Question 10

what are the 2 electrolysis rules

Answer 10

cathide- if metal more reactive than hydrogen than hydrogen is produced either metal
anode- if OH- and halide ions present, then molecules of chlorine, bromine or iodine will be formed if there are no hallide ions than oxygen is formed

Question 11

why are metal objects electroplated

Answer 11

to improve appearance and resistance to corrosion