9A Redox

Question 1

Oxidation state of an atom in its elemental form vs an atom in in a compound

Answer 1

The oxidation state of an atom in its elemental form is always 0!
The oxidation state of an atom in a compound is generally non-0!

Question 2

Oxidation state of an atom in an element

Answer 2

0

Question 3

Oxidation state of a monoatomic ion

Answer 3

Charge of ion (Cl-=-1)

Question 4

Oxidation state of fluorine in a compound

Answer 4

-1

Question 5

Oxidation state of oxygen in a compound

Answer 5

-2

Question 6

Oxidation state of hydrogen in covalent compound

Answer 6

+1

Question 7

Oxidation state of hydrogen in compound with a metal

Answer 7

-1

Question 8

What do the oxidation states of all atoms in a neutral molecule add up to?

Answer 8

ZERO

Question 9

What does the oxidation state of all atoms in a polyatomic ion add up to?

Answer 9

The charge of that ion

Question 10

When is Oxygen’s oxidation number not -2

Answer 10

When it is a peroxide

Question 11

Oxidation Definition

Answer 11

Compound loses electron(S)

Question 12

Reduction Definition

Answer 12

Compound gains electron(S)

Question 13

What happens in an oxidation-reduction or redox reaction

Answer 13

One or more electrons are transferred from the reducing agent to the oxidizing agent

Question 14

Reducing agent is _____; it ______ electrons

Answer 14

Oxidized; loses

Question 15

Oxidizing agent is _____; It _____ electrons

Answer 15

Reduced; Gains

Question 16

What are half reactions split into

Answer 16

One oxidation and one reduction reaction. Electrons are written as reactants or products depending on whether they are gained or lost

Question 17

How can redox reactions be split in acidic or basic solutions

Answer 17

Acidic solutions: H2O and H+ can be part of the half reactions
Basic solutions: H2O and OH- can be part of the half reactions