5.2 Redox

Question 1

What are the steps to balance half equations?

Answer 1

1) balance atoms apart from O and H
2) add H2O to balance Os
3) add H+ to balance Hs
4) balance charges (e.g. 4H+ = charge 4+)

Question 2

What are standard conditions?

Answer 2

298K
100kPa
1M solution

Question 3

What does emf stand for?

Answer 3

Electromotive force

Question 4

How is emf calculated?

Answer 4

The more positive potential - the more negative potential

Question 5

The more positive the potential…

Answer 5

… The more spontaneous in favourable the reaction

Question 6

Limitations of emf

Answer 6

It does not take kinetics into account.
Even?
If a reaction is thermodynamically feasible, it may occur at such a slow rate that it does not actually occur
It also relies on standard conditions being maintained throughout a reaction where in reality the system may deviate

Question 7

If the overall potential value is positive…

Answer 7

… A disproportionation reaction is feasible

Question 8

If the overall potential value is positive…

Answer 8

… A disproportionation reaction is feasible

Question 9

If the overall potential value is positive…

Answer 9

… A disproportionation reaction is feasible