Chapter 7- Oxidation and Reduction

Question 1

What is oxidation?

Answer 1

The process of losing electrons

Question 2

What is an oxidising agent?

Answer 2

A species that accepts electrons, causing it to be reduced

Question 3

What is reduction?

Answer 3

The process of gaining electrons

Question 4

What is a reducing agent?

Answer 4

A species that loses electrons, causing it to be oxidised

Question 5

What is a redox reaction?

Answer 5

A reaction in which oxidation and reduction occur simultaneously

Question 6

What is the oxidation state?

Answer 6

The charge of an ion or the theoretical charge of an atom in a covalently bonded compound

Question 7

What is the oxidation state of an element and stable compound?

Answer 7

0

Question 8

What are the oxidation states of hydrogen, oxygen, halogens and group 1 metals?

Answer 8

hydrogen: +1 (unless bonded to metal)
oxygen: -2 (except in peroxide or with F)
halogens:-1
group 1 metals: +1

Question 9

What are the steps to writing a balanced half equation?

Answer 9

-Find the element changing oxidation state and balance if necessary
-Balance the charge using electrons
-Balance oxygens using H2O
-Balance hydrogens using H+

Question 10

What must you check before combining half equations to write a redox equation?

Answer 10

-Must contain the same number of electrons so one may need to occur multiple times in order to balance