electrode potential

Question 1

redox

Answer 1

oxidation- loss of electrons, increase in oxidation number, reducing agent
reduction- gain of electrons, decreased in oxidation number, oxidising agent
electron transfer results in generation of electric current

Question 2

electrochemistry

Answer 2

movement of electrons from one compound to another

- the direction of flow of electrons from one compound to another is determined by the electrochemical potential

Question 3

disproportionation

Answer 3

when the same atom is both oxidised and reduced

Question 4

rules for assigning oxidation numbers

Answer 4

1. free elements are assigned an oxidation state of 0
2. the oxidation state for any simple one atom ion is equal to its charge
3. group 1 are assigned +1
4. fluorine in compounds is always assigned -1
5. group 2 is +2
6. hydrogen in compounds is assigned an oxidation sate of +1 exception is hydrides (-1)
7. oxygen is -2 except peroxide (-1)
   the sum of the oxidation states is the oxidation number