Oxidation-Reduction Review

Which of the reactions represented by the following equations is an example of disproportionation?

2H2O2 -> 2H2O + O2

Which of the following equations represents an oxidation-reduction reaction?

2So2 + O2 -> 2SO3

In a redox reaction, MnO4- is charged to Mn+2. How many electrons must be lost or gained by Mn?

5 gained

The number of steps needed for balancing redox equations by the half-reaction method is?

7

The redox equation Cu+2 + 2Fe -> Cu + 2Fe+2 is?

Correctly balanced for the number of atoms but not for charge

In reduction, atoms or ions?

Decrease their oxidation number

In which process does a substance act as both an oxidizing agent and a reducing agent and oxidizes itself?

Disproportionation

Which is the most electronegative element?

Fluorine

In the reaction represented by the equation Na+ + Br- -> NaBr, which species is reduced?

Neither Species

The conversion of Mg -> Mg+2 + 2e- is?

Oxidation

When a glowing splint bursts into flames during the decomposition of H2O2, it indicates that which gas is produced?

Oxygen

In a balanced redox equation, how does the total number of reactant molecules compare with the total number of product molecules?

Reactants and products are always equal

In Redox reactions,?

The oxidizing agent is the substance reduced

What can you tell by tracking oxidation numbers?

You can tell which atom oxidized and which reduced

The algebraic sum of the oxidation number of the atoms in a compound?

Zero

What is the most common oxidation number of the hydrogen diatomic molecule?

Zero

A strong reducing agent easily gives up?

electrons

The part of a reaction that involves only oxidation or reduction is an?

half-reaction

The loss of one or more electrons from an atom is called?

oxidation

Another name for an oxidation-reduction reaction is an?

redox equation

The gain of electrons is called?

reduction

In redox equations, ?

the reducing agent is the substance oxidized

In a balanced redox equation, how does the total charge of reactants compare with the total products?

the total charge of reactants and products are equal