Redox Reactions

Flashcards on Redox Reactions

Redox Reactions

Reactions involving the transfer of electrons between chemical species, resulting in changes in oxidation states.

Oxidation

The addition of oxygen or electronegative element to a substance, or the removal of hydrogen or electropositive element from a substance.

Reduction

The removal of oxygen or electronegative element from a substance, or the addition of hydrogen or electropositive element to a substance.

Oxidizing Agent

A substance that accepts electrons in a redox reaction, causing oxidation of another substance.

Reducing Agent

A substance that donates electrons in a redox reaction, causing reduction of another substance.

Combination Reactions

Reactions where two or more substances combine to form a single product; often involves elements in their elemental form.

Decomposition Reactions

Reactions where a compound breaks down into two or more simpler substances; at least one product must be in elemental form.

Displacement Reactions

Reactions where an ion or atom in a compound is replaced by an ion or atom of another element.

Metal Displacement

A metal in a compound is displaced by another metal in the uncombined state.

Non-Metal Displacement

Reactions including hydrogen displacement and rarely occurring oxygen displacement.

Disproportionation Reactions

A reaction where an element in one oxidation state is simultaneously oxidized and reduced.

Oxidation Number

A number assigned to an element in a chemical compound that represents the number of electrons lost or gained by an atom of that element in the compound.

Stock Notation

A method of representing the oxidation state of a metal in a compound using Roman numerals in parentheses after the metal's symbol.

Disproportionation Reaction

A redox reaction in which the same substance is both oxidized and reduced.

Electrode Processes

An experimental setup where the oxidation and reduction half-reactions are physically separated, allowing the electron transfer to occur through an external circuit.

Redox Couple

Having together the oxidized and reduced forms of a substance taking part in an oxidation or reduction half reaction.

Electrode Potential

The potential associated with each electrode.

Standard Electrode Potential

Electrode potential when the concentration of each species taking part in the electrode reaction is unity and the reaction is carried out at 298K.