Sal reminds me of the father I always yearned for, someone who actually guides and assures their impressionable youngster. Someone who can teach me scientific endeavour, lavished with comedic remarks that are a sprinkle- nothing to take away my focus, but to keep my attention with a quirky analogy. Because of him, I've begun to enjoy mathematics and truly appreciate the fundamentals of science and technology more than just an abstract interest and admiration. We are lucky to have this sensei to assure us.
sal you are an amazing teacher!! thanks to you i have learnt so many things. Immunity, calculus, trigonometry, redox reactions, stoichiometry, and a lot more!!! Sal you deserve a nobel prize the way you have helped so many people achieve higher grades in school and uni definately qualifies you to recieve one!!!
It's funny, I go to a 75 minute class twice a week just to NOT have this explained to me. Meanwhile 15 minutes later on this video, the material turns out to be very easy. Why is my money going to this professor....?
God bless you guys for doing this :) I am so grateful for your videos they are wonderful. Your videos is what helped me get through this course and get an A Thank you so very much
I view Electrons as small, negative, crying babies. You feel pretty reduced when you recieve one. You feel you can breathe when you get rid of one (Oxygen-ish)
Thank you! I complete school via correspondence and learn almost entirely from a written text. I was so confused about Redox reactions before watching this video, but now I am all clear. Thank you for articulating this lesson with such clarity.
Thanks a lot....i was just going through the text book pages and my notebook blankly without actually understanding anything.....u made this topic simpler for me to understand....i m having my chemistry grade 11 final tommorow and i was afraid i wont get this topic but now i feel so relaxed....Thanks a lot!!! I Wish all teachers could teach like this....
I find it weird when I see people dislike something when, in fact, there is nothing to dislike about it. I think some people press the dislike bottom without even seeing or understanding what is in the video. Thank you very much for uploading this video. It is really helpful.
Thank you so much! I basically tore apart my textbook trying to understand this and you explained it perfectly and eloquently. You're amazing, thanks again!
I totally stumbled on this by accident, and then realized it was Khan at the end of the video. I remember listening to the Ted lecture, amazing stuff Mr. Khan!
This is wonderful. I just got a 66% on my Chem 101 midterm and I feel SO MUCH BETTER about chemistry after watching your videos. I might actually get a great grade in the class now :D Dont forget to be awesome.
Thanks a lot man, i wish my teacher was like you, we were on how to balance redox for dummies by 20 minutes and then 7 exercises to be done on 10 minutes, i got 1 out of 7, the whole class was just lost copying each other, the visuals were great, watching colors and connecting it with the periodic table was enough for me to understand.
a really clear and concise explanation to a topic that has confused me for a long time. the biological association you made is actually helping me out for my orgo class. Thanks for helping me tie it all together :)
This helped me so much with understanding Redox. However, when you were doing the equation saying whether the electrons were subtracted or added you have used a plus sign for both which made it a little confusing. Other than that this video was amazing. Thank you!
It depends on the equation. If the molecule is neutral, then the oxidation numbers, when added together, must be zero. Say you have FeO: oxygen has a charge of negative two, so it only makes sense that iron would have a charge of positive two. Another example would be if you have an ion: FeO+1 would mean that your oxygen, with the constant charge of negative two, would have to be added to an iron with a charge of positive three (-2 + 3 = +1). ..I hope this makes some sort of sense.
In the last two reactions the element that became positive should give away electrons, but the video says that it gain electrons, besides this minor slip this video helps a lot thank you
1) divide reaction into 1 oxidation and 1 reduction rxn 2) balance each one of these half rxns by following these steps. A)balance elements other than H and O B) balance O atoms by adding H2O as needed C) balance H atoms by adding H+ as needed D) Balance charge by adding e- as needed. 3) multiply each by an integer to get = numbers of electrons 4) add half rxns
Dear Khan, I know I have said it before, and you're sick of hearing it from all of your adoring fans, but THANK YOU I LOVE YOU THANK YOU THANK YOU THANK YOU OMGOD YOU SAVED MY LIFE WAAAAAA!!!!!!!!
The first 2H2 is hydrogen gas, so its neutral, whereas on the other side of the equation, the 2H2 is from H2O, which is neutral overall, but when you break it down, the O has a -2 charge so the hydrogen has to neutralise the -2 charge. Since there are two hydrogens, each hydrogen has a +1 charge to neutralise the oxygen. Sorry if this doesn't help, I probably suck at explaining :S
Nice explanation, whatever my stuffy 23 pgs of textbook explains you explain in 30 minutes. We definitly need a KhanAcademy series for AP courses especially for Chemistry, Physics, Psychology, English Literature, and Computer Science on the AP level.
Hydrogen is ALWAYS +1 (At least in any compound I've heard of) Carbon does often form positive cations, but this is usually in haloalkanes and stuff. :)
because those 4 electrons aren't part of H2 molecule anymore, they've gone and are now no longer attached to the H2. The point of a chemical equation is to show what a reactant produces. And that reaction produced two H2 molecules and 4 electrons.
Based on the explainations i see in the comment section of this video, i would like to say that chemistry would be easier for studnts and instructors if the instructor explained chemistry (which is hard on its own) while writting what he/she is explaining to the students. Try listening to this video without watching it! and you have met my instructor!
I'm with you. that's how I teach it to 16 yr olds. Oh and I invented one myself you might like. U2 (which were my fav band many moons ago.) To remember the difference between alkanes and alkenes and which are saturated and unsaturated. The 2 stands for the 2 letter "e" so alkene and 2 stands for double bond so alkenes have a double bond. The U stands for unsaturated so alkenes are unsaturated. peace
Your videos & explanations are very good. Much clearer than most can deliver by a long shot. But a comment/question. When naming an oxidizing agent or reducing agent, doesn't it have to be the whole compound named, not just the element? I.E. In the methane example at 8:20, Carbon is oxidized, but isn't it supposed to be CH4 is the reducing agent? Rather than saying carbon is the reducing agent? I checked two textbooks & it looks like they are saying the whole reactant/compound has to be named
since it's FeCl2, the Cl2 has a charge of -1 so the FeCl2 needs to be neutralized. So since you know that Cl2 has a charge of -1, which it essentially has TWO -1 charges because of being diatomic, you know that you need a +2 of something to neutralize the negative Cl2.. and then that's where the Fe+2 comes in.
Sal reminds me of the father I always yearned for, someone who actually guides and assures their impressionable youngster. Someone who can teach me scientific endeavour, lavished with comedic remarks that are a sprinkle- nothing to take away my focus, but to keep my attention with a quirky analogy. Because of him, I've begun to enjoy mathematics and truly appreciate the fundamentals of science and technology more than just an abstract interest and admiration.
We are lucky to have this sensei to assure us.
Damn. I couldn't learn this in a week, I learned it in 8 minutes. You're too awesome! Thank you.
sal you are an amazing teacher!! thanks to you i have learnt so many things. Immunity, calculus, trigonometry, redox reactions, stoichiometry, and a lot more!!! Sal you deserve a nobel prize the way you have helped so many people achieve higher grades in school and uni definately qualifies you to recieve one!!!
I really like how you explain the little things to us. Not like other teachers that expect us to know most things already. (Y)
OIL-RIG = Oxidation Is Loss Reduction Is Gain
Yeah, I like that
THANK YOU!!! After 6 years of studying this... I can finally grasp it because of this video.
It's funny, I go to a 75 minute class twice a week just to NOT have this explained to me. Meanwhile 15 minutes later on this video, the material turns out to be very easy. Why is my money going to this professor....?
I wonder that every time I learn on the tubezz
exact same story but 78 minutes instead 😒
God, he makes it so simple. I don't understand my chemistry book or my instructor. Thank God for these youtube videos.
wow.. tried to find a video that i could actually learn this stuff and you go beyond my expectation. Thank you!
God bless you guys for doing this :)
I am so grateful for your videos they are wonderful. Your videos is what helped me get through this course and get an A
Thank you so very much
Your voice...it's so soothing.
It makes me LEARN things...
Hey guy, I'm brazilian and it was the most simple explanation that I have ever seen.
Thank you very much
Excellent video! I was so confused about Redox reactions but this helped tremendously!
My chemistry teacher doesn't explain good but watching this video makes it better!
I view Electrons as small, negative, crying babies.
You feel pretty reduced when you recieve one.
You feel you can breathe when you get rid of one (Oxygen-ish)
You're calm. You speak at a good pace. And I learned how to do redox in 14 minutes. You are sent from the chem gods. THANK YOU.
Thank you! I complete school via correspondence and learn almost entirely from a written text. I was so confused about Redox reactions before watching this video, but now I am all clear. Thank you for articulating this lesson with such clarity.
THANK YOU for explaining this so clearly.
Thanks a lot....i was just going through the text book pages and my notebook blankly without actually understanding anything.....u made this topic simpler for me to understand....i m having my chemistry grade 11 final tommorow and i was afraid i wont get this topic but now i feel so relaxed....Thanks a lot!!! I Wish all teachers could teach like this....
GREAT VIDEOS DUDE! Keep it up you're helping a lot of people and your bettering the future of our world!
I find it weird when I see people dislike something when, in fact, there is nothing to dislike about it. I think some people press the dislike bottom without even seeing or understanding what is in the video.
Thank you very much for uploading this video. It is really helpful.
Beautiful! I have never seen this explained so well. Thanks.
ur da man ive been trying to figure this out for 2 weeks and u did it in 14 minutes ur amazing
This single video has helped.me understand.everything about redox dude you are amazing
Thank you so much! I basically tore apart my textbook trying to understand this and you explained it perfectly and eloquently. You're amazing, thanks again!
I totally stumbled on this by accident, and then realized it was Khan at the end of the video. I remember listening to the Ted lecture, amazing stuff Mr. Khan!
Thank you so much for this video. I had a mini epiphany during this video. My Chemistry teacher really confused me but you made it so easy!
Un-be-liebable. You're a hero! Thank you!!!
thank u so so much! i cant explain how much this helped! your the best
Thank you so much mate! This claryfies chemistry a lot... Cheers!
your explainations are so easy, and understndable, please keep uploading more science
Thank you!! Could not have gotten through Chemistry without your videos. I'm not exaggerating either! p.s. I could listen to your voice all day :)
thanks a lot! i've asked a lot of people and this really made me understand our lesson ^^
This is wonderful. I just got a 66% on my Chem 101 midterm and I feel SO MUCH BETTER about chemistry after watching your videos. I might actually get a great grade in the class now :D Dont forget to be awesome.
You are an absolute legend!
Thanks a lot man, i wish my teacher was like you, we were on how to balance redox for dummies by 20 minutes and then 7 exercises to be done on 10 minutes, i got 1 out of 7, the whole class was just lost copying each other, the visuals were great, watching colors and connecting it with the periodic table was enough for me to understand.
a really clear and concise explanation to a topic that has confused me for a long time.
the biological association you made is actually helping me out for my orgo class.
Thanks for helping me tie it all together :)
The "Three Musketeers of Electronegativity." So awesome! Thanks, Sal!
so to everyone, the oxidation numbers are: H=1, O=-2, Al=3, F=-1. memorize those.
thank you my man, excellent job
i came for minecraft, i got SCIENCE
I love you man, you make Chemistry look to easy Thanks for this video !!
You are my go to guy for chemistry and calculus. Thanks for all your help!
love it...makes it so much more clear!
my teacher make me confuse , but you are a true teacher
Thank u :DDD
This makes so much sense !
U've just made Chemistry like a piece of cake :D !
This helped me so much with understanding Redox. However, when you were doing the equation saying whether the electrons were subtracted or added you have used a plus sign for both which made it a little confusing. Other than that this video was amazing. Thank you!
Greetings from Germany!
now i understand it!thank you so much!
thanks so much! i was absent from school when they taught this. but im sure you taught it clearer than my teacher :P
Muchísimas gracias por este gran video. Saludos desde Argentina
I freaking love you!!! thanks soo much for what you do!!! :)
Thanks ! This helped me A LOT !
You rock.
It depends on the equation. If the molecule is neutral, then the oxidation numbers, when added together, must be zero. Say you have FeO: oxygen has a charge of negative two, so it only makes sense that iron would have a charge of positive two. Another example would be if you have an ion: FeO+1 would mean that your oxygen, with the constant charge of negative two, would have to be added to an iron with a charge of positive three (-2 + 3 = +1).
..I hope this makes some sort of sense.
In the last two reactions the element that became positive should give away electrons, but the video says that it gain electrons, besides this minor slip this video helps a lot thank you
This was great I understand it much clearer than before. Thank you!
Really clear and easy, thanks a lot.
Pushed the like button.
I want you to know that you have saved my grade.
Thanks!
1) divide reaction into 1 oxidation and 1 reduction rxn
2) balance each one of these half rxns by following these steps.
A)balance elements other than H and O
B) balance O atoms by adding H2O as needed
C) balance H atoms by adding H+ as needed
D) Balance charge by adding e- as needed.
3) multiply each by an integer to get = numbers of electrons
4) add half rxns
Dear Khan, I know I have said it before, and you're sick of hearing it from all of your adoring fans, but THANK YOU I LOVE YOU THANK YOU THANK YOU THANK YOU OMGOD YOU SAVED MY LIFE WAAAAAA!!!!!!!!
I'd learn more watching your vids for a day, than in a week in school
Great video! I finally understand redox reactions!!!!
my test is today, thank you so much for clearing it up!!
This really REALLY helped me out, thanks!
PS: six people failed to understand redox reactions..
makes perfect sense, thanks for clearing it up !
i got kicken out of chemistry for the rest of the year SO your my new teacher i supose XD really thanks
OMG you are the best Sal!! Thanks!
Thank you very much! Now I'm more ready for my final exam!
Thank you for clearing this up for me
The first 2H2 is hydrogen gas, so its neutral, whereas on the other side of the equation, the 2H2 is from H2O, which is neutral overall, but when you break it down, the O has a -2 charge so the hydrogen has to neutralise the -2 charge. Since there are two hydrogens, each hydrogen has a +1 charge to neutralise the oxygen.
Sorry if this doesn't help, I probably suck at explaining :S
It's nice to see a video with + 250,000 views without religion/ politics arguments.
This was really helpful thanks for explaining this.
Nice explanation, whatever my stuffy 23 pgs of textbook explains you explain in 30 minutes. We definitly need a KhanAcademy series for AP courses especially for Chemistry, Physics, Psychology, English Literature, and Computer Science on the AP level.
so. incredibly. helpful.
haha, loved it when he called N, O, F the "three musketeers of electronegativity". legendary!
Governments should stop wasting money on schools, but pay this guy to make videos. :D
Thnx a bunch -
And big yayy for enlightening me abt OILRIG
thx vegas! reminds me of good old school times!
Hydrogen is ALWAYS +1 (At least in any compound I've heard of) Carbon does often form positive cations, but this is usually in haloalkanes and stuff. :)
hey man.....thx a lot! your videos help my A&P and Chem courses.....GBU!
absolutely great explanation
This was really helpful.Thank you!
seriously, awesome awesome awesome!! now i really understand redox reactions, haha happy!!
because those 4 electrons aren't part of H2 molecule anymore, they've gone and are now no longer attached to the H2. The point of a chemical equation is to show what a reactant produces. And that reaction produced two H2 molecules and 4 electrons.
its funny how the university of youtube teaches better then my actual university -.- great video :D
Thank you for making me feel smart again
great work. even if i come germany, i get what u explain!
thank you! better then my teachers, and they talk german :D
Based on the explainations i see in the comment section of this video, i would like to say that chemistry would be easier for studnts and instructors if the instructor explained chemistry (which is hard on its own) while writting what he/she is explaining to the students. Try listening to this video without watching it! and you have met my instructor!
I'm with you. that's how I teach it to 16 yr olds.
Oh and I invented one myself you might like.
U2 (which were my fav band many moons ago.)
To remember the difference between alkanes and alkenes and which are saturated and unsaturated.
The 2 stands for the 2 letter "e" so alkene and 2 stands for double bond so alkenes have a double bond.
The U stands for unsaturated so alkenes are unsaturated.
peace
Thanks a ton for this video.
Thankyou! Now I understand this concept.
You are Amazing Bro, Love you
Amazing video!
how do you make this so easy to learn...you are a hero
good thing you have videos on youtube i have a horrible chem professor
Khan acadmay!!! You have, once again, saved my ass!!!
Your videos & explanations are very good. Much clearer than most can deliver by a long shot. But a comment/question. When naming an oxidizing agent or reducing agent, doesn't it have to be the whole compound named, not just the element? I.E. In the methane example at 8:20, Carbon is oxidized, but isn't it supposed to be CH4 is the reducing agent? Rather than saying carbon is the reducing agent? I checked two textbooks & it looks like they are saying the whole reactant/compound has to be named
I actually have trouble listening to my chem teacher...dunno why. But all I know is, I don't have a hard time listening to you
simple, rich in content, perfect !
since it's FeCl2, the Cl2 has a charge of -1 so the FeCl2 needs to be neutralized. So since you know that Cl2 has a charge of -1, which it essentially has TWO -1 charges because of being diatomic, you know that you need a +2 of something to neutralize the negative Cl2.. and then that's where the Fe+2 comes in.
very clear understanding! Thank you :)
awesome video, helped me for my yearly :D
Thank you! This was so helpful!