What is a redox reaction?
A redox reaction occurs when one substance involved in the reaction is reduced, and another substance is oxidized.
Thanks, but that doesn't help me too much!
Q: What does it mean for something to be reduced?
A: That means the charge of that substance has been reduced due to the addition of negatively charged electrons.
Q: So what does it mean when something is oxidized?
A: When something is oxidized, it means it has lost electrons and gains a positive charge (subtraction of a negative)
Q: What is an example of a redox reaction?
A: Here is an example...
In this reaction the nitrate ion (
Cu begins with a charge of 0 as a reactant (pure elements are neutral) to a +2 charge when paired with 2 copies of the nitrate ion. This means the copper was oxidized.
The silver begins with a +1 charge (you know this because it's paired in a 1:1 ratio with the -1 nitrate) to having a charge of 0 when in its pure elemental form after the reaction. So the silver was reduced.
Here is a video discussing this topic:
Hope this helps!