Chem 30 Unit B

Every REDOX reacion contains both a REDuction half, and an OXidation half. 

when half reactions are written seperatley, the electrons are written in the half reaction equation. 

When electrons are lost (oxidation) the are written on the right side of the equation

When electrons are gained (reduction) they are written on the left side of the equation.

when a substance/atom/ion loses electrons

When an atom/ion gains an electron, it is called reduction.

a reaction will occur spontaeneously between an OA and an RA as long as the OA is higher on the table than the RA (in the formula sheet)

To determine whether a reaction is spontaneous or non-spontaneous use the following guide: 

When the oxidizing agent is above the reducing agent the reaction is spontaneous. When the oxidizing agent is below the reducing agnt, the reaction is non-spontaneous.

the relative tendency for an atom to attract a pair of bonding electrons, elements with high electronegativities are strong oxidizing agents. Strong reducing agents have low electronegativities.

A redox table is a list of reduction half reactions. 

The half reactions are placed in a special order: the strongest oxidizng agent (SOA) is at the top left of the table, and the strongest reducing agent (SRA) is at the bottom right of the table.

In a REDOX reaction, the reducing agent is oxidized and the oxidizing agent is reduced. 

Reducing agent: Donates electrons, undergoes oxidation

Oxidizing agent: Accepts electrons, undergoes reduction

The study of electron transfers in chemical reacrions. Electrochemisry is often referred to as REDOX since all electrochemical reactions are composed of two parts. Reduction and Oxidation.