Redox

Definitions

100

 What is the Oxidation State (Number)

The charge held by an element in a compound

200

What is the oxidation number of any free element??

0

300

What is a Reducing Agent?

žThe REACTANT that helps another to be reduced.

žThe reactant that is oxidized.

400

What is the last step in Balancing Full Reactions

Balance Spectators

500

 What is Oxidizing Agent

žThe REACTANT that helps another become oxidized. 

žThe reactant that is reduced.

OX or RED?

100

What do LEO and GER go with?

LEO- OX

GER- RED

200

I lost my electron

ox

300

Joe found an electron and now it is his

red

400

Mn²⁺+ + Cl₂ -> Cl^- + MnO₄^-

OX

500

Sb₂O₅ + I^- -> Sb³⁺ + I₂

red= 4e^- + Sb⁵⁺ -> 2Sb³⁺

Problems

100

Balance HgO -> Hg + O₂ 

2HgO -> 2Hg + O₂

200

State whether the substance is oxidized or reduced and what is the number of electrons gained or lost in this substance= Cr in CrO₂^- -> CrO₄^2-

Oxidation 3e^-

300

What is the Oxidation State of S₂O₃

S₂⁺³O₃^-2

400

What is the Oxidation number for Mn in MnO₂

+4

500

Balance KClO + C₁₂H₂₂O₁₁ -> KCl + H₂O + CO₂

8KClO + C₁₂H₂₂O₁₁ -> 8KCl + 11H₂O + 12CO₂

True or False

100

In most compounds, the oxidation number of hydrogen is 1+

fax

200

In most compounds, the oxidation number of oxygen 2+

False, it is 2-

300

Oxygen atoms must be present if oxidation is to occur

F

400

The Oxidation numbers of group IA and IIA are numerically equal to the group number. 

True

500

Oxidation can occur without reaction taking place

Cap

Random

100

In Acidic Solution Balancing, how do you balance oxygens. 

Add H2O

200

What is the Oxidation State of Nitrogen when not bonded with oxygen?

-3

300

What does LEO stand for? 

Lose Electrons OXIDATION

400

What is the first step in Balancing Full Reactions

Determine LCM between electrons

500

What is the oxidation number of the Alkaline Earth Metals and zinc?

2+