Redox Reactions

Question 1

Oxidation number of atoms in their elemental state

Answer 1

0
(Ex. Br2, I2, Na, O2)

Question 2

Oxidation number for monoatomic ions (ex. Na+)

Answer 2

Oxidation state equal to the charge of the ion
(Ex. Na+ = +1)

Question 3

Fluorine when combined with another element

Answer 3

Always has an oxidation number of -1

Question 4

Hydrogen oxidation number with and without a metal

Answer 4

With a metal- depends to make molecule neutral
Without a metal- +1

Question 5

Oxidation state of Oxygen

Answer 5

-2

Question 6

Chlorine, bromine, iodine (except with oxygen or fluorine)

Answer 6

-1

Question 7

Algebraic sum of oxidation states for atoms in a compound

Answer 7

Must be 0 for neutral compounds or the total charge of a polyatomic ion

Question 8

Oxidation

Answer 8

Oxidation state of that element increases
- loses an electron to become more positive
- also the reducing agent

Question 9

Reduction

Answer 9

Oxidation state of element decreases
- gains an electrons to become more negative
- reducing species is also called oxidizing agent

Question 10

OIL RIG

Answer 10

Oxidation is loss
Reduction is gain