Oxidation- Reduction Reactions

Question 1

Oxidation-reduction/reactions/redox reactions (all the same)

Are when

Answer 1

Electrons are transferred from one reactant to the other

Question 2

Redox reaction

Do electron transfers need to be a ________ transfer for the reaction to qualify as O-R?

Answer 2

Complete

And no

Question 3

What happens when a hydrogen is bonded to a cholorine

Answer 3

There is an increase in electron density ( reduction) for chlorine

And

Decrease in electron density (oxidation) for hydrogen

Question 4

O-R

How do you convert a free element into an ion?

Answer 4

The atom must either gain or loose an e-

(If one atom looses them the other must accept them

Question 5

What is it called when there is a reaction where e- are transferred from one atom to another?

Answer 5

Redox reactions

Question 6

Atoms that loose e- are being_____

While

Atoms that gain e- are_______

Answer 6

Oxidized

Reduced

Question 7

Are oxidation states ion charges?

Answer 7

No

Oxidation states are imaginary charges assigned based on a set of rules

Ion charges are real, measurable charges

Question 8

When there is a non metal + non metal or do not involve 02 chemists created an oxidation state

What does an oxidation state do?

Answer 8

Allows them to determine the electron flow in the reaction

Question 9

Rules for assigning oxidation states:

1) free elements have an oxidation state = 0
- Na=0 Cl2=0 in 2Na(s)+Cl2 (g)
2) Monatomic ions have an oxidation state equal to their charge
- NaCl Na= +1 and Cl=-1
3) (a) the same of the oxidation states of all the atoms in a compound is 0
- Na= +1 and Cl= -1 in NaCl, (+1) + (-1) = 0

Answer 9

(B) Group II metals have an oxidation state of +2 in all of their compounds
- Mg= +2 in MgCl2

5). In their compounds, non mental have oxidation states according to the table below

Non metals higher on the table take priority

Question 10

Oxidation nonmetal state

Fluorine
Hydrogen
Oxygen
Group7a
Group 6a
Group 5a

Answer 10

Fluorine= -1
Hydrogen= +1
Oxygen= -2
Group 7a= -1
Group 6a= -2
Group 5a= -3

Question 11

Identifying Redox Reactions:

What is oxidation
What is reduction

Answer 11

Increase in oxidation state

Decrease in oxidation state

Question 12

Redox Reactions Summary:

Oxidation and reduction must occur___

The reactant that causes reduction in another reactant is called____

The reactant that causes oxidation in another reactant is called___

Answer 12

Simultaneously

Reducing agent ( the reducing agent contains the element that is oxidized)

Oxidation agent ( the oxidizing agent contains the element that is reduced)

Question 13

Combustion Reactions:

______ are characterized by the ________ of a substance with _____to form one or more oxygen- containing compounds often________ _______

Answer 13

Combustion reactions
Reaction
02
Including water

( combustion reactions also emit heat)