Oxidation-Reduction Reactions

[@boricuababyhuey7576]

Thank you for not being like other Chem professors who pretend these particular reactions are so simple. The language itself is confusing and the Chem Department doesn't try to simplify despite the the thousands we pay them to TEACH US! THANK YOU!

[@shannonriley8299]

yes i have noticed that too, when i went to embry riddle the teachers there helped us out. but now at an a&m univeristy, i feel most of the time i have to hunt and peck to find my answers.

[@JackDawf]

what is it that gets done with this infomation though? Im desperately struggling to understand what practice would utilize this knowledge for any real world application. It seems utterly contrived and useless. I would appreciate if someone can elaborate which real world process requires you to measure hypothetical oxidation levels of nonexistent, purely-mathematical atoms/ molecules.

[@yenifervanegas]

I am 10 min away from a test and I just learned the last thing I needed to know 😭 thank you so much!!!

[@dzbro1194]

how much did u get

[@phoebegotanco7904]

yea i wanna know too

[@yenifervanegas]

If I remember correctly 80

[@rambo6767]

@@yenifervanegas nice

[@shahzadahmed5012]

@@yenifervanegas better late than never

[@toniacladera8885]

Thank you, professor David. Your videos were absolutely useful in my first year teaching Chemistry in your country!

[@ProfessorDaveExplains]

so happy to help a teacher! please tell all your students to subscribe!

[@krizh-rq6jx]

i have no words to express sir other channels online put vids of 10 hours and show hundreds of reactions but dont even explain a single one properly i was frustrated with this thanx a lot for making it simpler

[@martinmemo1253]

There is a mnemonic: OIL RIG. OIL- "Oxidation Is Loosing (electrons)" and RIG- "Reduction Is Gaining".

[@thadszmaciasz8971]

LEO and GER are also great (Lose Electrons Oxidation) (Gain Electrons Reduce)

[@SkynByShadene]

I still don’t understand

[@Realramboff]

Go eat Morvite😂

[@ysabellefranz9625]

you should look for the reactants, not in the products

[@cutty3482]

@@ysabellefranz9625bless

[@SarahKhan-sv4fc]

So me

[@ari_i33]

Been 5 years,hope you understand it now 😭

[@willardmakinishi6980]

Prof Dave rocks. Your explanations are very simple and direct. Thumbs up for making life easier for me

[@zombieslayersofdoom]

Thanks again Professor Dave. You explain chemistry well, and concisely too - two reasons why I subscribed! :D Keep it up.

[@maxjones4650]

Two things: 1) Is the idea of an element being reduced by gaining electrons essentially like adding a negative number in algebra? So, if the starting number is 10 and -2 is added, then 10 is reduced to 8 because it "gained" -2. Yes/No? 2) Are oxidation eductions typically covalent or ionic bonds? Or can it be either one depending on the circumstance? Thanks Prof. Dave & mates!

[@hydromic2518]

1) Yes 2) it depends, it can form a covalent or an ionic bond

[@esmfamil5086]

I wish you had a video over every single topic out there. When I search something on youtube and finally your video comes up, ik my search is over

[@p.vidhya6305]

Yes

[@mazazaboy]

Okay my man you are better than my teacher, this has summed everything I've done for months without understanding

[@MedK001]

In the checking comprehension exercise, on the last exercise... Al2(SO4)3 You assigned +3 to Al2, +6 to S and -2 to O. Would it be possible to assign 8 to S and keep Al as 0? If not, why not?

[@user-kb3qw4jf4d]

While assigning oxidation states (OS) of +8 to sulfur (S) and 0 to aluminum (Al) in Al2(SO4)3 might seem mathematically possible, it deviates from established principles for two key reasons: Charge Neutrality: Al2(SO4)3 is a neutral molecule, meaning the sum of its oxidation states must equal zero. Since each sulfate ion (SO4) carries a -2 charge (-2 x 3 = -6 for three sulfate ions), aluminum collectively must have an oxidation state of +6 to balance this negative charge. Assigning +0 to Al would violate this principle. Typical Oxidation States: Sulfur's common oxidation states range from -2 to +6. In Al2(SO4)3, sulfur shares electrons with oxygen in the sulfate ion. Based on these electron sharing patterns, a +6 oxidation state for sulfur is more realistic. Aluminum, on the other hand, almost exclusively exhibits a +3 oxidation state in ionic compounds due to its tendency to lose its three valence electrons for stability. Therefore, assigning +3 to Al and +6 to S adheres to both the charge neutrality requirement and the established oxidation state behaviors of these elements within Al2(SO4)3. Sorry if my explanation was a bit long 😅😅

[@brandenanderson6580]

1 week of lecture taught in 4 minutes

[@joshuamontgomery0]

Hi Professor Dave! I love your checking comprehension section at the end!

[@An_Onion]

There is one other time that oxygen has a oxidation state other than (-2) and that's in OF₂, where it has a (terrifying) charge of (+2). Your videos are awesome, btw. You teach a lot like I do, skipping a lot of the BS and half-assing that a lot of general chemistry courses use.

[@boofang10]

BRILLIANTLY explained Professor David.. not easy for sure to be untrained mind, but with repeated viewing of this short 3 min 51 second clip.. YOU WILL UNDERSTAND & know how to recognize the Oxidation and Reduction in terms of change of charge + recognizing the Agents by seeing what happens to it originally 👏🏻👏🏻👏🏻

[@roroh.t1180]

Thanks 😆😆you really made me understand chemistry finally !! Since I was in high school I felt like I will never understand chemistry and thanks again I get good grades in my exam because of you 🌚✌🏼

[@sealogic4552]

I feel like these videos are entertaining enough that I'd actually go out of my way to watch them, not just when I'm struggling to complete the chemistry project that's due tomorrow. It's like Game Theory, but without the games.

[@ProfessorDaveExplains]

That's exactly what I'm going for! My dream is that everyone will watch them just to learn a little science, not just because they have to for school. But take of your obligations first! Then you can bonus learn.

[@areejmateen5183]

I’ve been learning from your videos since quite a few months now, lets just say you’re a hero.

[@gamingwithpopzzz2614]

I was really confused by watching other videos finally I came to watch ur video I'm really thankful sir🤩

[@krishbarot4984]

Thank You SOOO SOOO Much, you don't know how much of a LEGEND you are!!! I've been looking for a simple and straightforward explanation to recap what I had learnt and you finally helped me out. I don't know why I didn't watch your video earlier. But now I've subbed you so I will always remember to watch your videos for help :)

[@p.vidhya6305]

Mee too same thing 😭😭😭 I don't understand this topic but after seeing his lecture I could understand it easily I too subscribe him 😀😀😀

[@Buzzhumma]

thanks for elevating me from feeling like a moron 😀

[@nishita9587]

Can you explain half reaction??? Btw this video is amazing I loved it and it is really helpful

[@arwaandphysics477]

kzbin.info/www/bejne/nXPHiniceJWal9U Please have a look May be you find this useful

[@eb_1498]

this guy has taught me oxidation and reduction reactions within 3 mins whilst my teachers couldn't do it with hours and days teaching me some boring ass textbook work that didn't help me one bit, it just goes to show that if you want to learn something you have to go out and learn it yourself

[@willnicolas9198]

Thank you for saving my soul from failing chem.

[@vivekpathak6949]

ideal11 app khailo

[@christiancamacho6033]

Thanks Professor Davis!!! Sending appreciation all the way from California!!!!

[@maxguarda]

Thank you Dave for the GREAT free content!

[@samcoopermusic]

In the final comprehension question, is there anyway to know that SO4 has a net charge of -2 without looking up Sulphur on the table? Or is that ultimately inferred from the fact that there are 2 Als and 3 SO4s? Question for Dave or anyone. Also, I LOVE THIS CHANNEL! Thanks for the vids.

[@tantsuya3274]

in my ap chem class we just had to memorize the polyatomic ions and their charges so that's what's in the bag for us sorry for being a year late

[@samcoopermusic]

@@tantsuya3274 Better late than never! Yes, memorization and/or cheat sheets are the way to go.

[@fendas123]

I didn't comprehend anything!

[@Daniel-pe9zr]

You are amazing. Simple and down to earth, straight to the facts.

[@adhiyanthaprabhujeyashanka2091]

Yeah

[@heinstein2811]

You deserve a million subscribers sir! I love you so much already!

[@nyx246]

your wish was our command

[@observer7418]

I have that same shirt and now I can wear it while knowing a little more about redox reactions.

[@kikithepupper6774]

he looks like someone who shreds guitar, but he shreds knowledge and sprinkles on our pizza

[@kumarvaibhav4937]

Awesome explanation professor.It cleared my confusion.Thanks.!

[@karthikdani]

Thank you sooo much sir, u r helping a lot in my 2 years preparation

[@lesonyafire310]

A BIG thanks from Texas. thanks you sooooo much.

[@gaia7804]

THIS MAKES SO MUCH SENSE NOW THANK YOU

[@larssrensen4353]

Thanks, I am in 4th year of industrial engineering and I have a subject called "Metal science: Corrosion and Surface Technology". I used to learn this multiple times but keep forgetting about this.

[@T1tanSalazar]

That beginning tho😂😂

[@abinayasivasamy4708]

Thank you Professor Dave for making science more easier. Could you please try to upload the method to balance an equation using oxidation number. Esp. the equation FeSO4 + KMnO4 + H2SO4 -> Fe2(SO4)3 + MnSO4 +K2SO4 +H2O

[@ProfessorDaveExplains]

check out my tutorial on balancing redox reactions

[@kisho2679]

Why is it important to determine how many oxidation states an element has; what conclusions does it tell?

[@satishjangir19]

Nice teaching

[@zahara3070]

THANK U SO MUCH. U JUST SAVED MY LIFE FOR MY CHEM MIDTERM!!!!!

[@A2ZU2BR]

I am Indian really you explain it very well thankyou ☺️

[@ahmedelbadry7008]

i love u man ,thanks from Egypt

[@fromtopgun3560]

Wow this literally did not help me at all but thank you for the effort. I might sound dumb but I legit need pictures not chemical formulas

[@nerengen0054]

3:14 explain the last one

[@EEEE-zs8sz]

Wanted to explain but u prolly graduated now

[@indy8298]

​@@EEEE-zs8szcan you explain to me instead? 😁

[@EEEE-zs8sz]

​@indy8298 sure man but lowkey had to do all the calculation again cuz chemistry have been goin so fast. Anyways basically the Al charge is 3+ cuz u can see a 3 after the bracket of SO4 suggesting that aluminum got a charge of 3+ and SO4 got a charge of 2- because u can see beside the Al there is a 2, now S is 6+ because after doin the math where x+4(-2)= -2 the answer gonna be 6 as u take the negative 8 to the other side and subtract it, and then the Oxygen is 2- as ya know. Idk if ya get it cuz im explaining it while shitting 🙏🏼

[@LorenzoBattilocchi]

Thanks a million, Professor Dave, from Ireland!

[@patrickj.7782]

Thanks for your content as always! I was able to solve all of them except the last one Al2(SO4)3. I dont see how I would have assumed the oxidation number for sulfur and aluminum to be those values. Am I missing something?

[@ProfessorDaveExplains]

You can assume -2 for oxygen and go from there.

[@user-ko9de8yv9m]

@@ProfessorDaveExplains I am also confused, shouldn't the sulfur be +8 if the oxygen was -2(4)

[@ProfessorDaveExplains]

The ion has a 2- charge so the numbers must add up to -2, not 0.

[@AKoboldsAdventures]

@@user-ko9de8yv9m The so4 has a minus 2 charge so the S is +2. The entire molecule is neutral and since the ion appears thrice it is -6 so the Al has to be +3

[@dastanroy3784]

sir please make video on grahams law of diffusion

[@pvptwist]

This video was so resourceful .Thank you so much .Everything was explained so easily.

[@hehebwoy4132]

I wish you are my chemistry teacher. You would be the best. Like the videos.🙌💯

[@LaneOswalt]

thank you for explaining this, it has taken me so long to figure these problems out

[@food_44]

Much clearer than the CrashCourse video, geess

[@victoriacure513]

I love you chemistry jesus

[@kevineodira673]

What a simple way of learning!!

[@jonathansoriano2794]

Thank you so much for this video it really helped on my homework!!!!

[@lukehauser1182]

Thanks, great mnemonic

[@lisafiorino4626]

Thank you very much, this really helped me study for my unit test!

[@zaid-zi6qy]

jesus is teaching us. 😛

[@musabqaiser3658]

i had the same thought for a sec

[@agentsquid9079]

@@askjfjawjhwahwjehjsjah1668 He looks Jewish

[@kenjiro2676]

ITS THE MESSIAH

[@RunningManPhClips]

don't be disrespectful you ritard

[@syedah9941]

Thanks professor Dave, you helped me so much but I'm a little confused about the checking comprehension. I got the first 5 right but I don't understand that last compound. Aluminum sulfate? I don't understand how the oxidation number for S is +6

[@ProfessorDaveExplains]

the whole sulfate ion must add up to -2, as that is the charge on the ion, so 4 times -2 for the oxygens gives -8, we need +6 on the sulfur to get to -2

[@ProfessorDaveExplains]

check out the lewis dot structure for the sulfate ion!

[@lexfransis]

Dude you have no idea how much you helped me thx

[@SairaAbbas-l8y]

Your cartoon in start is very funny I enjoyed😂 well done . Good explanation . God bless u

[@maxschrader2411]

thanks for the help!! did not understand this in the least until watching your video

[@gopalmatcha4436]

Short, sweet... Perfect!

[@user-lq8jq2rk7d]

Thank you very much professor Dave you just break everything down for me to my understand❤❤ I'm so grateful

[@wowiezowiepowie]

also if you have a glass batch containing antimony acting as the redux chem in glass it is a "sweeper" creating oxygen which rises to the top of the pot "grabbing" all other bubbles including any oxygen to be reabsorbed putting the glass into reduction......

[@saintofchelseathomascarlyl5713]

(press pause for more time) makes me smile every time ^__^

[@christiancamacho6033]

Dave* Sorry ._. but I really do love your videos. Thanks for extending my love of science! !😁

[@scottbutler3774]

Hi Professor Dave, taking 3U chemistry here. Just wondering if you could do a video or a snippet on balancing redox rxn's. That way folks can can learn to plug in some coefficients using this.

[@ProfessorDaveExplains]

I already did that!

[@scottbutler3774]

@@ProfessorDaveExplains was that in this video? I've been looking for that tidbit, as I'm stuck with it. But I was talking about using the electron transfer to find coefficients for the entire equation.

[@ProfessorDaveExplains]

Just search professor dave balancing redox reactions.

[@scottbutler3774]

@@ProfessorDaveExplains thank you kindly sir!

[@hyehye4063]

Wonderful Explanation . I love that . Thank you very much.

[@brd8764]

when redox is really something.

[@ceylonunboxer]

You are a good teacher Dr. Dave. Thank you.

[@the.mermaid.scientist]

Finally. I understand now 😂😂This is the ONE concept I absolutely could. not. grasp. in high school chemistry. 25 years ago. i just gave away my age but so what. Fortunately I passed and the Universe decided I should not despise chemistry after all =)

[@goitomsereke1286]

Thank you too much from today I am your client. Oredy I was subscribing to your channel

[@goitomsereke1286]

🖐️👍😅😋🙄🤩😢

[@middleweightchamp7798]

Best teacher on youtube by a mile

[@robinlazulite3167]

Super helpful, thanks so much!

[@wieslawkruczala3205]

What strange words "oxidized" and "reduced". As a physisist I hate misleading terms plentiful in chemistry and biology. I would say "deelectronized" and "electronized".

[@aariamore2120]

nicely explained ! thank u so much! 🙌i thought as if my brain cells were leaving me (coz of my chem prof's "teaching skills")...but now am ok...

[@cadiusthegreat4530]

I be feelin so smart then boom, “let’s check for comprehension”

[@ajsim]

great video! thank you

[@raven_705]

two hours before my test 💪🏻

[@SKippySounds]

How does Cr2 have an oxidation number of 6 if you just said that single elements are equal to 0?

[@robertofalgiano1846]

Cr2O7 ^(2-) is a poliatomic ion. If one atom of Oxygen has -2, 7 atom of oxigen will have -14( 7x-2).Now,in order to respect the rule,we must have: Ox.number of Cr x 2(because we have 2 atom of Cr) + Ox.number of Oxygen x 7(for what we said)= 2-(charge of poliatomic ion). We can rewrite using "x" for ox.number of Cr: 2x -14=-2 2x=12 x=6.

[@sharmiladavid396]

From India thanks a lot sir do more such basic vedios because if the base is strong then everything is well automated

[@zero_meercat8624]

lol

[@sharmiladavid396]

Zero_Meercat y wts wrong

[@bismahsadaqat4129]

Woah you just stopped the teacher-student favoritism in our chem-class.

[@jbuno9756]

Finally I found What they call "chemistry jesus" 😭😭🙏

[@marshalcraft]

Thanks, but what difference of electronegativity and oxydation number?

[@ProfessorDaveExplains]

they are not related at all so that's tough to answer

[@yashwasnik6083]

great sirji, ur videos are very good to understand and remember concepts in chemistry.... from center of India, NAGPUR

[@mageshkailashkailash9791]

Now, i am studying class 12 until i watch your video I don't about these clearly..👁 thanks dave sir (" professor dave explains")

[@axediepied6993]

amazing explanation

[@ArtinTheBeast]

2:13 - Well, that depends. If it's bonded to a nonmetal, then yes, it's +1, though if it's bonded to a metal it's actually -1.

[@ProfessorDaveExplains]

that's why i said "almost always".

[@ArtinTheBeast]

Professor Dave Explains oh right, that makes sense. I overheard that part.

[@commandergamez1]

Good luck on your tests guys!

[@Chloe-mm9ms]

at 2:52 why are the reactants both zero and the products their respective charges even though all of those are just single elements?

[@rahulk4482]

Dude my mom spends money on chem tutions, and this was more helpful than 4 to 6 hours worth of classes

[@hadjerjija1331]

شكرا على الترجمة

[@dude9864]

O2 was shown to have 0 charge and O was shown to have a -2 charge then in the comprehension part O2 is -2

[@ProfessorDaveExplains]

elements have zero for oxidation number

[@dude9864]

@@ProfessorDaveExplains Is O the element or is O2 the element? (because it it exists as a diatomic molecule)

[@ProfessorDaveExplains]

O2 is elemental oxygen, a diatomic molecule. O3 would also count as elemental. When oxygen is present in a molecule, it is not elemental.

[@dude9864]

@@ProfessorDaveExplains So O has 0 charge and both 02 and 03 have -2 charges?

[@ProfessorDaveExplains]

No, when an element is by itself, like molecular oxygen, which is O2 and O3, the oxygen atoms have oxidation numbers of zero, because they are bound only to other identical oxygen atoms. When oxygen is in a molecule, bound to other elements, it has some non-zero oxidation number. Consider watching this tutorial again.

[@ccc1193]

But why charge of ON of Al2(SO4)3 is +3 +6 -2 at last question??

[@ProfessorDaveExplains]

oxygen is always -2, sulfates add up to -2 so S must be +6, and there are three sulfates that add up to -6 so each Al must be +3. it all has to add up to zero!

[@ccc1193]

Thx!

[@stelo1558]

in the last compound in the assigning oxidation set, why does 'S' in (SO4)3 get an oxidation number of 6? Why wouldn't it be 2-?

[@cassied9327]

Very succinct and helpful

[@nnennadoris327]

Thank you so much dear

[@arianaisabela9652]

Thank you for this vid!