Cells

Question 1

What are the two simplified half equations for electrolysis of water in acidic conditions?

Answer 1

2H20 –> O2 + 4H+ + 4e- (oxidation)
2H+ + 2e- –> H2 (reduction)
2H20 –> O2 + H2 (overall)

Question 2

What are the two half equations for electrolysis of water in basic conditions?

Answer 2

2H20 +2e- –> H2 + 2OH- (reduction)
4OH- –> O2 +2H2O + 4e- (oxidation)
2H20 –> O2 + H2 (overall)

Question 3

Do fuel cells and galvanic cells produce heat?

Answer 3

Yes, both fuel cells and galvanic cells produce heat

Question 4

What aspect of a half equation indicates alkaline conditions?

Answer 4

If the equations includes OH- ions

Question 5

What are the defining features of a fuel cell?

Answer 5

Load, electrolyte, anode and cathode

Question 6

In an electrolytic cell, is the stronger reducing agent or stronger oxidising agent being reduced at the cathode?

Answer 6

The strongest oxidising agent present will always be reduced