Redox equations

Question 1

What is oxidation and reduction?

Answer 1

is the loss of electrons

is the gain of electrons

Question 1

What are redox reactions?

Answer 1

are reactions where oxidation and reduction are both taking place at the same time

Question 2

What are half equations?

Answer 2

are equations showing the oxidation or reduction reactions separately

Question 3

What’s an oxidation state/number?

Answer 3

is a number given to each atom or iron in a compound to show the degree of oxidation

Question 4

What are the states when oxidation number increase and decrease?

Answer 4

increase is oxidation

decrease is reduction

Question 5

How do you balance half equations?

Answer 5

balancing the number of electrons lost and gained

putting the two half equations together

Question 6

What’s a reducing and oxidising agent?

Answer 6

reducing- loses electrons and gets oxidised

oxidising- gains electrons and gets reduced

Question 7

What’s a displacement reaction?

Answer 7

is a reaction where one atom replaces another in a chemical reaction

Question 8

Oxidation number rules:

Answer 8

elements by itself: 0
group 1a: +1
group 2a: +2
halogens(7a): -1, positive w oxygen
monatomic ion: ion charge
H: +1 w non metals, -1 w metals
O: -2 except peroxide(H2O2)
F: always -1
sum of neutral compound: 0
sum of polyatomic ion: ion charge