Redox Reactions

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Redox Reactions

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11 жыл бұрын

031 - Redox Reactions
In this video Paul Andersen explains how redox reactions are driven by the movement of electrons from the substance that is oxidized to the substance that is reduced. Oxidation is the loss of electrons and reduction is the gaining of electrons. Since electrons are not normally displayed in a chemical equation oxidation numbers are important in determining what atom is oxidize and what atom is reduced. Redox reactions are important in energy production and can also be used in basic titrations.
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Пікірлер: 303

@kaden56 8 жыл бұрын

Are youtube teachers really better or is it something about the setting of being alone in front of your computer watching the video and having access to a pause button? Whatever it is it's a real thing. I could earn a better education from youtube for free than paying for one at my university. To bad a shiny KZfaq diploma won't get me a job that puts food on the table. Thank you for your help!

@leticiamatsubara7298 6 жыл бұрын

We are totally buying diplomas at Universities, the real learning is always on us...

@SabyUsa1 6 жыл бұрын

Mainly because our instructors don't teach...

@karahfreeman 6 жыл бұрын

This is sadly true, I was literally just talking about how horrible my instructor is, I learn way more from KZfaq.

@bodake2557 6 жыл бұрын

It should be a crime specifically when it comes to IT learning, The classroom lags WAY behind. I was taking a web development course, this is in a college BTW and the most that was taught was how to use the tag in HTML and they called it programming lol.

@classicbass3456 6 жыл бұрын

Its the use of animations and writing things out directly in front of you. Also, being able to pause really helps. I do find youtube videos are better because they are pre-planned on a specific topic a teacher often has to teach many things throughout the day and will forget to say certain things that could be very crucial for someone to learn. A simple "i did this because of this" can be the difference between "ohhhhh i get it now" and "i lost you half way and didnt understand the rest".

@RemiTa1st 10 жыл бұрын

I swear to god you're the best teacher i've ever had in years i don't know how to thank you. I feel like writing a comment isn't enough i want to thank you so freaking much. you are the best and I wish you all the best and that you live a life full of laughter and happiness.

@f1shispro 6 ай бұрын

remember.

@mathyouprayter 10 жыл бұрын

Oxidation numbers: Mn=0 Pb=+2 (NO3)2=-1 -----> Mn=+2 (NO3)2=-1 Pb=0 Manganese is being oxidized Lead is being reduced The reaction is a Single Replacement Half Reactions: Mn ---> Mn(NO3)2+2e- Pb(NO3)2+2e- ---> Pb

@donnellray306 10 жыл бұрын

Can you explain how you got (NO3)=-1?

@mathyouprayter 10 жыл бұрын

Because Nitrates charge is -1? I may have done it wrong though. Ill check later and reply back.

@donnellray306 10 жыл бұрын

No wait you did it right, I just forgot that the oxidation rule for ions is that it is always its regular charge

@chloesargent1135 10 жыл бұрын

Sorry can you explain how you got (NO3)2=-1 and Pb =+2 please

@BouBoow 10 жыл бұрын

Chloe Sargent NO3, nitrate has a negative charge (-1). According to the rule, the oxidation number= the charge. Therefore, NO3= -I Because we've got 2 nitrates (NO3)2, 2*-1=-2, so Pb has to have the oxidation number +II (+2) :)

@robby4780 8 жыл бұрын

You are the single reason I passed bio and are now the single reason I am passing chem. Bless you sir.

@asmaamostafa3812 9 жыл бұрын

6:58 Mg+2HCl----> MgCl2 +2H2 this equation is not balanced, the coefficient next to the hydrogen should be removed Mg+2HCl----> MgCl2 +H2

@ChocolateThunder1620 8 жыл бұрын

I noticed that too!

@smurProductionz 8 жыл бұрын

confused me

@maximilianfrendeus6661 5 жыл бұрын

yup, I noticed that too haha

@jkgan4952 2 жыл бұрын

yup thanks!

@istarzgirl 9 жыл бұрын

Thanks for the video, I find them a great way to review before the AP chemistry test! My teacher taught us a way to remember oxidation and reduction in terms of anode and cathode, "a" in oxidation for anode and the "c" in reduction for cathode.

@istarzgirl 9 жыл бұрын

No problem :) and as I continued watching his videos he taught the other way to remember "An Ox and a Red Cat", so either way works to remember.

@onlyparpar 8 жыл бұрын

Thank you for helping me understand so many things that I never fully understood before, both in chemistry and in medicine. I always recommend my classmates to watch your videos .

@lts2521 10 жыл бұрын

It never fails, I can spend hours trying to understand something in my textbook, but your videos are always far more helpful! I cannot thank you enough for helping me make A's in college this semester. You're basically teaching me chemistry AND A&P rather than my instructors. THANK YOU!!

@f1shispro 6 ай бұрын

remember.

@modkaz19811 4 жыл бұрын

most of the comments agree that u r the best who can simplify the most complicated science .... lucky to have u

@christianerickson5994 8 жыл бұрын

SO HELPFUL!!! I have my AP chem test tomorrow, and your videos have been so helpful all year! YOU ROCK!!!

@alexmarrero2 7 жыл бұрын

This video should really have shown how to find the redox reaction for that Mn + Pb example

@andyablett1466 10 жыл бұрын

Consistently delivering excellent tutorials. Great job and thank you!!!

@jamilla99 3 жыл бұрын

So far, you are the best chemistry teacher I found on KZfaq, you are better that my university teacher, thank you!

@jimena6264 Жыл бұрын

The way you explain it makes it so comprehensible and has helped me a lot, thank you so much for doing all this videos!!! Greetings from Mexico!!!

@memjaym 10 жыл бұрын

I was stressing out so much because I simply could not understand Redox reactions from reading my textbook. But you sir, have made me understand this in just over 11 minutes. Thank you! :D

@Akshyaofficial 9 жыл бұрын

AM I CORRECT????????? Mn + Pb(NO3)2 ----------> Mn(NO3)2 + Pb Mn=0 Pb=+18 N=-3 since they have 2 N it's = -6 O=-2 since they have 6 O it's = -12 -------------> Mn=+18 (Mn have increased in its oxidisation state from 0 to +18 so it is considered as oxidisation) N=-3 O=-2 Pb=0 (Pb have decreased in its oxidation state from +18 to 0 so it is considered as reduction)

@K3707H 8 жыл бұрын

+Akshya piano Playlist official We know that the polyatomic ion NO3 has a charge of -1, and since there are two of it per side: Mn + Pb(NO3)2 --> Mn(NO3)2 +Pb has oxidation numbers: 0 +2 -2 +2 -2 0 Mn is reduced 2 e- Pb is oxidized 2 e-

@JT22347 7 жыл бұрын

@K3707H other way around for the reduced and oxidized and remember OILRIG

@RinKagamine02WRYYY 5 жыл бұрын

You👏🏼taught👏🏼me👏🏼when👏🏼my👏🏼teacher👏🏼didn’t

@periodt1117 4 жыл бұрын

HEY ARMY YOU STILL ARMY??😀💜💜 i know that nico nii ANYWHERE

@K3707H 8 жыл бұрын

Thanks Paul! I learned a lot here that my teacher didn't know how to teach!

@xelaceey1298 10 жыл бұрын

Absolute life saver, all questions answered. Thank you so much

@Enjoy714 10 жыл бұрын

You are an excellent teacher. Thank you.

@ForlanElCapo 9 жыл бұрын

awesome vids! everyone loves khan academy, but i have to say a lot of your vids are more clearly and quickly explained than khans. sometimes he takes too long to explain simple concepts, but the pace you go through is perfect!

@nada1357 7 жыл бұрын

6:18 why does S have a charge of +6?? How r we suppose to know when the ion have a charge of 2-??? What is happening omg help...

@keelythurecht549 11 жыл бұрын

My exam is tomorrow! I love you Mr Anderson!

@imapabdou2503 8 жыл бұрын

I love you, Man. you really clarified everything for me.

@wetnwild1976 8 жыл бұрын

thanks!! very helpful, ive started a biomedical science degree and i have no chemistry at all before I started it!! this has helped me A LOT xx

@Smauggish 10 жыл бұрын

Thank you soooo much for making your videos, without them, I'd be one lost chemistry student. You are awesome! :D

@sharmakdeep 10 жыл бұрын

@7:00- the equation is not balanced. Should be H2 instead of 2H2 on the right side.

@dajungkim4983 8 жыл бұрын

Thank you very much!!! This helped me alot! Watching this video is more effective and more worthy than 3 hours of boring chemistry class at school. Thank you once again:)

@Phantom0701 7 жыл бұрын

Dajung Kim

@fdsChan 9 жыл бұрын

Thanks a lot bozeman science, yet again you have made a lot more intelligent in just 10 minutes of your video. I would just like to point out to everyone that the chemical reaction equation between magnesium and hydrochloric acid is not balanced

@joliexxxable 10 жыл бұрын

you just save me!!!! I have a test tomorrow and I finally was able to understand this; but it was thanks to you!!!!!!!!!!!

@iCantMakeMovies 10 жыл бұрын

I'm not sure if anyone caught this yet, but the oxidation of magnesium with HCl to afford magnesium chloride and hydrogen is improperly balanced. There should not be a coefficient in front of gaseous hydrogen on the product side.

@MsHani17 10 жыл бұрын

I noticed that too.

@willybillyrillysilly317 Жыл бұрын

i love you bozeman science

@notclaryc 7 жыл бұрын

Bozeman I'll love you to do more videos about chemistry 🙏🏻 Your way of explaining and teaching makes everything easier to understand damnn

@Lauraandreinaa_ 7 жыл бұрын

Your videos are so awesome!!! Thank you so much for taking the time and effort to explain concepts clearly and thoroughly. You are the reason I am passing (and understanding) chemistry. Thank you so much!!!!!!!!

@periodt1117 4 жыл бұрын

Ong...you are a LIFESAVER GOD BLESS YOU💜💜💜

@angelinemendoza2305 10 жыл бұрын

I love you so much. I feel like a genius now!

@youssefelaziz6101 7 жыл бұрын

Thanks for your excellent and professional work of teaching Chemistry via Skye. I have two remarks in this lesson is that you forgot to emphasise that the half reactions of redox involved equilibrium. You wrote the half equations of redox as if they were one-way reactions. Rather then reversible. This simple mistake can make the whole topic much more difficult to understand than is necessary. The second remark that at 8.03min the chemical equation is not balanced. Please take intention to that All the best for you Dr Youssef El Aziz

@anibharath1967 7 жыл бұрын

thanks for doing this man, i love science and your videos help me a lot with my AP chem quizzes. keep doing what you're doing!

@alel9191 10 жыл бұрын

thank you. it helps. I didn't understand my instructor when she explained in the class. but you made it so easy. you are awesome man

@wormyqueen 10 жыл бұрын

It's man crush Monday so Mr.Anderson, you are chemistry hunk. Thanks for helping me though gen chem 2.

@HelloSpyMyLie 10 жыл бұрын

You are so fucking cool Mr. Bozeman. I wonder where you went to school. I wanna be like you when I grow up.

@rezwannazeri 5 жыл бұрын

You're a lifesaver Paul, god bless

@doreenbaraka6478 8 жыл бұрын

soooooooooooooooooooooooooooooooooooooo helpful!!!:) thanx. You explain a lot of biology and chemistry better than my teachers. Keep posting I am so greatful. I totally understand particularly the oxidation numbers

@hellodolphin9284 8 жыл бұрын

Thank you to that person who translated to Thai! So helpful !

@bb4715 8 жыл бұрын

+Stamp Bp i love thailand

@bb4715 8 жыл бұрын

+Stamp Bp I'm from BKK

@sriganesh4544 7 жыл бұрын

you r'e the best teacher ever

@Filipinogenetics 9 жыл бұрын

First actual helpful video I've found! Thx a lot for making this!

@marjanbonyadi3118 7 жыл бұрын

I wish I saw this video before handing in my report. Thank you for making this kind of helpful videos ;).

@rayhanali7414 3 жыл бұрын

How does the sulfur in sulphate have a +6 charge? Please could you explain.

@dietcthulhu2533 Жыл бұрын

thanks for carrying me through ap chem

@nageswararaolingineni737 10 жыл бұрын

Massive help ..! I'm so confident that I'm going to crack my exam.. :) Thank you so much

@Uforiik 10 жыл бұрын

so helpful! you are better than my teacher at school

@babadooq9846 7 жыл бұрын

Hey Mr Andersen, Right at the start of the vid, you say we are "transferring high energy electrons to more low energy electrons".. Can you clarify in what way/mechanism they change energy state please.. for example, by moving between electron shells, or maybe to a different Heat of Enthalpy/Formation or one of those things? Thanks, you're a lifesaver!!

@aneeshbhamidipati8696 10 жыл бұрын

Mn + Pb(NO3)2 → Mn(NO3)2 + Pb Oxidation Numbers 0 +2 (-1)2 +2 (-1)2 0 Mn: oxidation number increased from 0 to 2 (it became more positive), which means that it lost two electrons. Loosing electrons means oxidation. Therefore, Mn is oxidized. Pb: oxidation number reduced from 2 to 0 (it became more negative), which means it gained two electrons. Gaining electrons means reduction. Therefore, Pb is reduced. Half reactions are as follows: Oxidation reaction: Mn → Mn(NO3)2 + 2e- Reduction reaction: Pb(NO3)2 + 2e- → Pb

@Melissa.3315 4 жыл бұрын

Thank you thank you thank you!!!

@mprickles 11 жыл бұрын

Oh man, Thank you! This has come at the right time! Your videos are great!

@divacutegirl9999 8 жыл бұрын

i have a chem exam tomorrow! this helped me alot!!!!!! thanks

@laurendennis3248 10 жыл бұрын

Pb(NO3)2(aq) + 2e- --> Pb(s) REDUCTION Mn(s) --> Mn(NO3)2(aq) + 2e- OXIDATION Anyone agree? Thank you again for all your help!

@mynameisggn 11 жыл бұрын

Maaan my test was this morning !! If only this was up earlier

@drewkendal 10 жыл бұрын

8:15 shouldn't it be: Mg (s) + 2HCl (aq) -----------> MgCl2 (aq) + H2 (g) instead of Mg (s) + 2HCl (aq) -----------> MgCl2 (aq) + 2H2 (g) ???

@drewkendal 10 жыл бұрын

***** why so sad? :P

@lucianoazor7864 9 жыл бұрын

you're right, he's talking so much of stoichiometry but he has himself made a mistake in balancing an equation lol!

@jezyiissexy3725 6 жыл бұрын

YEAAA I thought I was going insane lol

@theanadine 9 жыл бұрын

Thank you so much! I can now answer my homework

@honlamwan 11 жыл бұрын

At 1:00 , you have the Gaining and Losing pointed at the Oxidation numbers on the reduction side and the oxidation side respectively, that might be confusing since oxidation is an increase of oxidation number, while reduction is a decrease of oxidation number..

@shortridgegregory 5 жыл бұрын

It would help if you would discuss how electrons can be transferred from one element to another when the bonds on both sides of the equation are covalent (shared electrons).

@wesmjr 9 жыл бұрын

At 8:43, you make the equation "2HCL(aq) + 2e- -> 2H2(g)" and I understand that the chlorine goes with the magnesium to form a MgCl, but where do you get the 2 extra hydrogenatoms? And because there are now 4 H atoms, doesn't that mean that the total charge had to be -4?

@Nick-pk9xg 8 жыл бұрын

Nitpicky note (not that it really matters), but before you introduced rule #3 Oxygen is -2 (peroxs. -1) etc..., while it was faded out, it read "Oxygen is +2..." rather than -2.

@xiiixiiih.16 Жыл бұрын

What is Maggie+chloey in first faze, before reduced amplified, and compounded w/Leddy

@santiagocortes7964 2 жыл бұрын

thanks to you I entered university and I hope that with your help I can get out of it

@maidulsifat3410 8 жыл бұрын

that was really helpful! keep it up!

@roiannebenjamin4128 8 жыл бұрын

Thanks this was very helpful. One question though. Can you explain why we seem to just be making up the oxidation numbers for some of the elements. I learned that the oxidation number for sulfur is -2, but your showing it as +4 in the SO3 problem. Also please give the final answer for the practice problem. I think I have it right, but I'd like to be sure. Thanks.

@missmadie3 9 жыл бұрын

Great instruction, two thumbs up

@newwindboy 10 жыл бұрын

sir i have a question , Why does the [Redox Reaction] Mg + 2HCl → MgCl2 + 2H2 , the hydrogen product isnt balance with the reactant , i thing it should be Mg + 2HCl → MgCl2 + H2

@Aussiepingpong 10 жыл бұрын

This was very helpful. Thanks!

@clintluna6884 8 жыл бұрын

QUESTION: Why do they call it "Oxidation" and "Reduction of oxidation" when you're gaining / losing electrons....I would have thought it would've had to do with oxygen entering the system or reacting with these other elements. THANKS!!

@nimashparana1788 10 жыл бұрын

Thanks mate! Helped so much

@Zenyx 5 жыл бұрын

For those who don’t know Sin Opposite Hypotenuse Cosine Adjacent Hypotenuse Tangent Opposite Adjacent

@devnayak8171 8 жыл бұрын

kya baat hai MR. Anderson...@@@

@yadavshashankkumar 10 жыл бұрын

sir u r really awesome , u made me understood

@demirodriquez3501 5 жыл бұрын

Such a helpful video to refer to 🙏

@talallouche1714 10 жыл бұрын

you are awesome! please keep making these videos, it helps so much even when I think something is impossible once you show me how to do it becomes the easiest simplest of things. by the way I always wanted to make videos like that but I just haven't mastered chemistry quite yet. thanks again. you are awesome.

@Oopsie223 9 жыл бұрын

Great instruction. If you have been watching crash course you will notice that this is much more helpful. Sorry Hank!

@theprinterlady 9 жыл бұрын

Hank can't be beat for giving really quick overviews - but his is not intended as an indepth study. Mr. Anderson is wonderful for the more indepth look... but if I need just a fast reminder of an entire concept, I turn to Hank.

@kartechnology7591 8 жыл бұрын

Bro! You Saved Me...Your Awesome!!

@dl1599 10 жыл бұрын

Still a big fan of your videos. They help me understand so much better! Thank you! :)

@briannacarmichael5211 10 жыл бұрын

Shouldn't the hydrogen on the reactant side be just H2?

@MUHAMMADTAYYAB-tweety 6 жыл бұрын

Hello Sir, I have a question... Why the conductivity of group 1 elements from Li to Na increases but from Na to from Fr there is a decresing order??

@Danielagostinho21 6 жыл бұрын

looking to a compound with oxigen, How can I know that is a Peroxide or an Oxigen? I asked many times my teacher and she comes with a circular conclusion.

@kavyamorya1258 5 жыл бұрын

Thank u. Pb(No3)2 +2(-1)×2 So oxidation state of Pb is +2 Pb ion gains 2e- and become get reduced to element Pb. Mn. 0 Mn lose 2e- and get oxidized to Mn(+2)ion .

@jambogradkowski3358 11 жыл бұрын

Electrons are negatively charged, (each -1). Gaining electrons results in a reduction of the charge meaning it is more negative or reduced, (though there must be a deeper explanation than this). It might be helpful when understanding that something is oxidised when it loses electrons in a reaction. An oxidising agent attracts electrons strongly. so when something is oxidised the electrons are lost (attracted) to the oxidising agent.

@chemistry_net7479 7 жыл бұрын

Thank you for this video regarding redox reactions

@thefinal__sage5696 6 жыл бұрын

PEACE BRUDDA SAVED MY LIFE OUR TEACHERS EXPLAINING IS VERY CONFUSING

@MSKDoes 6 жыл бұрын

So true Mahmoud!! LOL We have the same teacher !!

@janardantoppo5764 7 жыл бұрын

Thanks Sir ap bahut acha samjhate hain sab samajh me as gaya.

@readmails3033 7 жыл бұрын

"Thanks Sir. You have explained really well. I have finally understood everything." in hindi.

@MunifTheGreat 11 жыл бұрын

I guess NO3 are spectator ions so they can be omitted from the equation.for the meanwhile So the oxidation # of Mn = 0, Pb = +2, Mn = +2, Pb = 0. Then, There is the oxidation of manganese: Mn --> Mn 2+ + 2e Reduction of Lead : Pb2+ + 2e --> Pb I don't know if i'm right though......

@mezoairable 10 жыл бұрын

a7la ms sammah best teacher ever gr.9

@skeche 7 жыл бұрын

For those confused with Pb(NO3)2.It is suppose to pre known knowledge that NO3 = -1 because HNO3 exists. H=+1 so NO3 = -1. So NO3x2 = -1x2 = -2, so Pb must be +2 for the neutral molecule to equal 0.

@mosh5521 7 жыл бұрын

Where is the answer of that practice question?

@serinitytinsleigh9749 9 жыл бұрын

Exactly what I needed! Thanks!

@felco1547 11 жыл бұрын

Can you explain why the gaining half of the reaction is named reduction and if the oxidation part has anything to do with oxygen as this what often confuses me. How are you supposed to know the oxidation numbers of one the elements in a compound in the first place...? Thanks

@KiddSmiley96 10 жыл бұрын

Is it acceptable to write Mn -> Mn2+ + 2e, rather than Mn -> Mn(NO3)2 + 2e???

@dianasilva6470 10 жыл бұрын

You are just amaziiiinnnng!!!! Thanks for this lesson... just great!

@torque8998 7 жыл бұрын

THANK YOU! You're an absolute ANGEL!! 😁÷D

@albertkresten4576 9 жыл бұрын

it is helpful video thanks to you but is it ok if the Cl has -1 charge and Cl2 has the same charge -1 like your example in 7:21

@thomaspurple3318 4 жыл бұрын

could you give some sort of indication for the correct answer to the question next time? I feel there's way of knowing if you did it right or if you need help with some other things if there's nothing to compare your answers to. great video despite that