Oxidation and reduction | Redox reactions and electrochemistry | Chemistry | Khan Academy

Introducing oxidation states, oxidation, and reduction. Some tips for remembering oxidation and reduction.

Chemistry on Khan Academy: Did you know that everything is made out of chemicals? Chemistry is the study of matter: its composition, properties, and reactivity. This material roughly covers a first-year high school or college course, and a good understanding of algebra is helpful.

About Khan Academy: Khan Academy offers practice exercises, instructional videos, and a personalized learning dashboard that empower learners to study at their own pace in and outside of the classroom. We tackle math, science, computer programming, history, art history, economics, and more. Our math missions guide learners from kindergarten to calculus using state-of-the-art, adaptive technology that identifies strengths and learning gaps. We've also partnered with institutions like NASA, The Museum of Modern Art, The California Academy of Sciences, and MIT to offer specialized content.

For free. For everyone. Forever. #YouCanLearnAnything

[carolinewalsh]

Like if your cramming for a chem test and this dude just saved you.

[AceOfSpades]

That awkward moment when a guy on the internet does a better job of teaching you than you're actual teacher does....

[Zeveelyn]

It's a bit sad that a video from 6 years ago helps me more than my current instructor.

[DashyMcDashDash]

I always remembered Redox as OIL RIG. OIL - Oxidation is loss. RIG - Reduction is gain.

[FrozenDubstep]

My Chemistry teacher wrote the fucking book we learn from and STILL doesn't teach as well as you. Thank you Khan Academy

[chewyshoey]

Thank you for finally adding to the chemistry videos. The Gen. Chem. Videos on Khan Academy are severely lacking and aimed for middle school children. Please continue the hard work :).

-Proud supporter-

[MrAkshaya]

Your explanation for determining the oxidized and reduced substances and oxidizing agent and reducing agent using concepts of electronegativity and oxidation state was on point. I also liked the whole color scheme that you used to explain the audience. Using Black background which is easy on the eyes, and different colors to represent different atoms/charges is very convenient and helpful. However, I just have one possible correction to make in the first few seconds of video: NaCl is an ionic compound. If you take a sample of table salt (or NaCl), it will not be composed of molecules but Na+ and Cl- ions bounded in a cubic crystal lattice. Ionic compound is the right term to be used for all type of salts.

[siandude]

OIL RIG
Oxidation is Losing, Reduction is gaining :)

[zrhsquad]

Is anyone gonna mention how good this guy is at drawing on pc with a mouse!!

[yavuznuriertas]

these guys are really good at teaching in a simple way.. i admired the oxidation-reduction explanations in this video. this is so cool!

[merandahooker]

I doubt you will see this, but I just wanted top thank you for all that you do. I can use your videos for my math and science and they always help me tremendously. So thanks- you are my at home science teacher. :)

[zahramohamad]

Awk moment when you try to learn the whole spec of chem the night before your exam #notagoodidea

[AmandaBee]

Ah. It seems no matter what I do I will never understand chemistry and the harder I try the more stressed I get and the more my head hurts :)

[infinitesimotel]

an atom that makes you cry is an onion, and the more shells removed from it the more you cry.

[Gauss]

Hhaahah awesome analogy about being Bernie Madoff'd

[soumyanag]

Cool!! To my chemistry professor now na I don't need you now I have Khan Academy😂😂😂😂

[angeloquimoyog]

Thank you! the way it is explained and how it is presented is easy to understand which also kept my concentration intact throughout the video.

[criticaltit]

Thank you Khan Academy! My textbook didn't explain why the term oxidization was being used even though no oxygen molecules were involved in a reaction. This explaination helped a lot!

[ssugd]

Are you guys learning this in high school too or...

[kisho]

how much Valence Electrons have groups (families) 8, 9, and 10?