Specification Point 2.20:
Understand the terms: Oxidation, Reduction, Redox, Oxidising Agent, Reducing Agent in terms of gain or loss of Oxygen and loss or gain of electrons
Oxidation state: The applied valancy (number of electrons lost/gained) of an element in a compound is called an oxidation state.
e.g.: Oxidation state of carbon (C) in carbon monoxide (CO) is +2.
Oxidation of carbon (C) in carbon dioxide (CO2) is +4.
P.S: The total oxidation of a compound is 0
|C + (-2)||= 0|
|C -2||= 0|
Aiming for a Level 9?
See if you’ve got what it takes. Test yourself with our topic questions.
Jamie got a First class degree in Chemistry from Oxford University before going on to teach chemistry full time as a professional tutor. He’s put together these handy revision notes to match the Edexcel IGCSE Chemistry specification so you can learn exactly what you need to know for your exams.
More Edexcel IGCSE (9-1) Chemistry Revision Resources