Electrochemistry

Question 1

define electrolysis

Answer 1

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

Question 2

which is the positive electrode?

Answer 2

anion

Question 3

which is the negative elctrode?

Answer 3

cathode

Question 4

What is the the electrolyte ?

Answer 4

the molten or aqueous substance that undergoes electrolysis

Question 5

Why are metal objects are electroplated?

Answer 5

to improve their appearance and resistance to corrosion

Question 6

How are metals electroplated

Question 7

State the use of hydrogen–oxygen fuel cell

Answer 7

uses hydrogen and oxygen to produce electricity with water as the only chemical product

Question 8

Describe the disadvantages of
using hydrogen–oxygen fuel cells in comparison with gasoline /petrol engines in vehicles

Question 9

Describe the advantages of
using hydrogen–oxygen fuel cells in comparison with gasoline /petrol engines in vehicles