Redox Reactions

final exam, chem 115, WVU fall '25

Alkaline earth metals have a charge of __

+2

Oxygen has a charge of ___

-2

Free elements have an oxidation number of ___

0

ON increases:

oxidation

ON decreases:

reduction

Metals like to give away electrons and form ___

cations

Nonmetals like to acquire electrons and form ___

anions

Reducing agent

substance that is oxidized

Oxidizing agent

substance that is reduced

Metals are ___ agents

reducing

Nonmetals are ___ agents

oxidizing

When hydrogen is bonded to a nonmetal, it has an ON of ___

+1

if only one element in a compound is being reduced,

the substance still counts as being reduced

Oxygen’s ON is -2 unless it’s [3 terms]

bonded to fluorine, in a peroxide, or in a superoxide

Peroxides have an ON of ___

-1 (p)

Superoxides have an ON of ___

-1/2

All ___ reactions are redox reactions

single replacement

If an element is pure on one side and part of a compound on the other side,

it’s always a redox reaction

hydroxide (OH) ions have a net charge of ___

-1 (h)

Decomposition reactions ___ redox reactions

can be

Combustion reactions ___ redox reactions

are always

Acid-base neutralization reactions ___ redox reactions

are not (a)

Double replacement reactions ___ redox reactions

are never (d)

A standard enthalpy of formation reaction must…

form one mole of a compound, use elements in their standard states, and occur at STP