Oxidation, Reduction and Redox reactions

Question 1

What does redox involve

Answer 1

A transfer of electrons from the reducing agent to the oxidising agent.

Question 2

What does oxidation mean

Answer 2

Loss of electrons
Loss of hydrogen
Gain of oxygen
Increase in oxidation number

Question 3

What does reduction mean

Answer 3

Gain of electrons
Gain of hydrogen
Loss of oxygen
Reduction of oxidation state

Question 4

What is an oxidising agent

Answer 4

An electron acceptor

Question 5

What is an reducing agent

Answer 5

An electron donor

Question 6

G1 oxidation state

Answer 6

Always +1

Question 7

G2 oxidation state

Answer 7

Always +2

Question 8

Oxygen oxidation state

Answer 8

-2 unless in peroxides or F2O

Question 9

Hydrogen oxidation state

Answer 9

+1 unless in metal hydrides

Question 10

Fluorine oxidation state

Answer 10

Always -1

Question 11

Chlorine oxidation state

Answer 11

Usually -1 unless in compounds with O and F

Question 12

What is the formula of a manganate ion?
What will it go to in acidic conditions and with a reducing agent

Answer 12

MnO4-
Mn 2+
Purple to pale pink

Question 13

What is the formula of a dichromate ion?
What will it go to in acidic conditions and with a reducing agent

Answer 13

Cr2O7 2-
Cr 3+
Orange to green