What are half-reactions?

Answer 1

A redox half reaction is a reduction or an oxidation reaction. He half reaction does not occur by itself it much be coupled so that he electron released for another to be accepted.

Answer 2

oxidation or reduction of an element

Answer 3

Equations showing which elements are oxidized and which are reduced

Answer 4

Some chemical reactions require oxidation and reduction to occur. Sodium and Chlorine react ... the sodium atoms lose electrons and become sodium ions. That is one half of what is going on. That is a half-reaction. At the same time the chlorine atoms are absorbing those same electrons to become chloride ions. That is the other half of what is going on. That is also a half reaction.

Symbolically you can write these as 2 separate things:

Na --> Na+ + e-

Cl2 +2e- --> 2Cl-

notice because chlorine is diatomic, there are 2e- involved in that half reaction.

You should now reconcile this by balancing the number of electrons to be the same in both half reactions by multiplying the top half-reaction by 2.

2Na --> 2Na+ + 2e-

Cl2 +2e- --> 2Cl-

Answer 5

The oxidation and reduction halves of a reaction

Answer 6

What is the half redox reaction for KI