Redox I

Question 1

Define oxidation and reduction

Answer 1

Oxidation is the loss of electrons, it involves an increase in oxidation state.
Reduction is the gain of electrons., it involves in a decrease of oxidation state.

Question 2

Define Redox

Answer 2

A reaction where oxidation and reduction takes place

Question 3

What is the oxidation number for a molecule ie chlorine?

Answer 3

0

Question 4

What is the oxidation number for uncombine elements ie Neon?

Answer 4

0

Question 5

What is the oxidation number of Hydrogen?

Answer 5

+1 usually
-1 in metal hydrides
0 in a molecule

Question 6

What is the oxidation number of oxygen

Answer 6

-2 usually
+2 in F20
-1 in hydrogen peroxide(H202)

Question 7

What is the oxidation number of fluorine?

Answer 7

-1 usually
0 in atom or molecule

Question 8

Define Oxidising Agent

Answer 8

A species which reduces itself (lowers it’s oxidation number) gaining electrons.

Question 9

Define Disproportionation

Answer 9

An element in a single species that has simultaneously been oxidised and reduced. This is seen through a change in oxidation numbers

Question 9

Define Reducing Agent

Answer 9

A species which oxidises itself(increase in oxidation number) losing electrons