Redox reactions

Question 1

One species undergoes simultanious oxidation and reduction?

Answer 1

Disproportionation

Question 2

Oxidation and reduction occur to give the same species

Answer 2

conproportionation

Question 3

What are the preconditions of redox in aqueous solution?

Answer 3

• reactants and products must be known

- separated oxidation and reduction reactions must be formulated

Question 4

What are the 5 steps to balance a redox reaction in aqueous solution

Answer 4

1. Determine oxidation states of redox couples
2. calculation of involved electrons
3. Balance the charge with H+ or OH- ions
4. Balance with water
5. calculation of lowest common multiple of involved electrons and combine both redox reactions

Question 5

What do we balance the charge with in an oxidic melth?

Answer 5

O2-

Question 6

What are typical oxide donors in an oxidic melt?

Answer 6

CO3 2-

Question 7

What is left over O 2- used for ?

Answer 7

reacts with Quartz (SiO2) to form SiO3

Question 8

Are single or double bonds favoured for lighter atoms?

Answer 8

double bonds

Question 9

What is an oxidant?

Answer 9

oxidizing agent: causes oxidation: IS REDUCED

Question 10

What is a reductant?

Answer 10

reducing agent: causes reduction: IS OXIDIZED

Question 11

If standard electrode potential is more negative?

Answer 11

it is more likely to be oxidized

Question 12

If standard electrode potential is more positive?

Answer 12

it is more likely to be reduced