NCEA Chemistry 3.7 REDOX AS 91393 Flashcards

Flashcards covering key vocabulary and concepts from the NCEA Chemistry 3.7 Redox lecture notes.

Reductant

The species that acts as a reducing agent, is oxidized, and loses electrons.

Oxidant

The species that acts as an oxidizing agent, is reduced, and gains electrons.

LEO

Loss of Electrons is Oxidation

GER

Gain of Electrons is Reduction

Cell Diagrams

Electrochemical cells represented using a shorthand notation that follows a standard IUPAC convention.

Cathode

In a standard cell diagram, the electrode where reduction occurs; it is always shown on the right-hand side.

Anode

In a standard cell diagram, the electrode where oxidation occurs; it is always shown on the left-hand side.

Standard Electrode (Reduction) Potential

The voltage obtained under standard conditions when that half-cell is connected to the standard hydrogen electrode.

Electrolytic Cell

An electrochemical cell that undergoes a redox reaction when electrical energy is applied.

Oxidation Reaction (Charging)

The discharging oxidation reaction that becomes a reduction reaction during charging of a battery.

Reduction Reaction (Charging)

The discharging reduction reaction that becomes an oxidation reaction during charging of a battery.

Battery Discharge Changes

During battery discharge, the amounts of oxidant and reductant decrease, while the amount of products increase.

Battery Charging Changes

During battery charging, the products from discharging become reactants, increasing the amounts of the oxidant and reductant.