How to Calculate Oxidation Numbers Introduction

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Published on June 15, 2015 by

We'll learn how to determine the oxidation numbers or oxidation states for a the elements in a chemical compound. The oxidation numbers tell us how electrons are divided up or shared between atoms in a chemical compound. The oxidation numbers also tell us how electrons move in an oxidation reduction (redox) reaction. There are a set a rules that we use to determine oxidation number. Group 1A elements (alkalai metals) always have an oxidation of +1. Group 2A elements (alkaline earth metals) always have an oxidation number of +2. Elements on their own have an oxidation number of 0, and monatomic ions have an oxidation number that is equal to the ionic charge.

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315 Comments

  • Lesa Pong 3 years ago

    You saved my life 😭♥️ chem quiz tomorrow.

  • Katerina Vogel 3 years ago

    thank you so much these rules and the way you explain is amazing i usally dont struggle with chemistry but this got me but you helped me understand it more and find a way to make it fun!

  • AHB #1 3 years ago

    Great teacher! Really I’m impressed of that you keep smiling while teaching. This shows that you really love what you teach. BEST!!!
    I have a Q: How can we solve this:
    Dioxygen monofluoride

    FO2

    I hope you can answer my Q a.s.a.p

  • Anisha Singh 3 years ago

    Can anybody please tell me in which class is this taught in india cbse board??🙏🙏

  • drai gun 3 years ago

    Love from India bro.. your videos are highly helpful…

  • IZAKRISTINA BAUTISTA 3 years ago

    Oh God u are a blessing🤧 Ive never understood Chemistry this perfect before. Tysm for saving my ass from a test!!

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  • Simranjit Kaur 3 years ago

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  • Isaiah Hamilton 3 years ago

    🙏🏾 thanks !!!

  • Ice Saylor 3 years ago

    i know this was posted years ago but literally i could not get this, my teacher wasn’t very good at explaining. going into the very simplest terms is sometimes necessary if you don’t understand & what you did really helped me finally understand, thank you!

  • Jim Henry 3 years ago

    I need to determine oxidizing levels for Tungsten metal at 5800 F?

    Do you have a formula?

  • Kaitlyn 234 3 years ago

    Studying for a test tmr at 8:30pm because my other teachers give me so much hw 😑

  • Kai Don’t Care 3 years ago

    Its important to know that Oxygen is usually negative 1 except when it has the highest electronegativity in the compound.

  • dfgdfgd 3 years ago

    10 minute video teaches me better than my prof

  • Nataziea Bumbury 3 years ago

    Wow, ur amazing

  • Manosh Al.abadi 3 years ago

    How do you know if it have a charge or not… How do know that it is neutral???

    • ibraaheem k. hinkston 3 years ago

      If the compound or element does not have a superscript then it is neutral.But if It does then whatever number is on the superscript is it’s charge(eg:-1,-2 or +1,+2).

  • Maria Rodriguez 3 years ago

    Why does chemistry contradicts itself so much? This is why I get confuse so easily.

    • Ryan W 3 years ago

      What exactly is contradictory? A big issue is a lot of topics are a lot more complex than we can teach early students, so some generalisations have to be made.

  • dr.paddlesmack 3 years ago

    please tell how to find ox. number for [Cu(NH3)4]2+

    • Ryan W 3 years ago

      There’s three different atoms there and you haven’t specified which one, each atom has an oxidation number.

      You should recognise NH3 as being ammonia which is a neutral molecule, you can easily work out the ON of N and H using the rules in this video.
      And since NH3 is neutral, then Cu’s ON is equal to the charge.

  • C.C. 3 years ago

    What is the O.S. of S2O3²– and S4O6²–?

    • Ryan W 3 years ago

      There’s two different types of sulfur atom in both of those so we can’t simply calculate it (well we can, it’s just not useful)

      In S2O32- it’s like sulfate with 1 O replaced by an S. The central S has an ON of +6, the terminal one has an ON of -2
      In S4O62- it’s even more complicated. The two central S bonded to 2 other S have an ON of 0 by definition. The two S surrounded by 3 O have an ON of +5

      You shouldn’t be asked to calculate those without the structure of it.

  • Leela Prasad 3 years ago

    Bro what is difference between oxidation state and oxidation number

  • Ahmed Abdul Hakeem 3 years ago

    keep going you are awesome

  • KRISHNA RAJ PANDEY 3 years ago

    Tyler, you’re an amazing teacher
    Thanks from India 🇮🇳

  • callof Duty Master 3 years ago

    magician

  • Jasmine Samantha 3 years ago

    At 7:32 how come we have to divide it for this problem but multiply it for the other ones?

  • Cortlin Jackson 3 years ago

    Goat

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  • Sizles Gaming 3 years ago

    Hey Mr Harris, decided I’d leave a comment here and see if ya ever find it. Who knows, maybe one day u will come across it.

  • Tanner Schier 3 years ago

    Thanks for doing all these videos.

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    my chem professor is trash!! God bless you lol

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    Although I am not a fan of science and my future education/career would probably have little things to do with science, your video enhanced my grade which is essential for university application. So, just want to let you know that your science videos are helping me to become a future united nations peacekeeping officer in Africa. (already got an internship in UN for the next summer!!)

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    • supermorgans1 2 years ago

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  • Dev Sharma 3 years ago

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  • Gabriel Winter 3 years ago

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  • Christopher Kight 3 years ago

    At 0:17 you say, “Check my video called ‘What are Oxidation Numbers'”, but I can’t seem to find that video anywhere in your videos. Did you name the video something else?

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    Thank you it really help me a lot

  • haine 3 years ago

    What’s a neutral compound?

    • Madelyn Rose 3 years ago

      haine The charge of the compound = 0

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  • عبدالسلام اليافعي 3 years ago

    Thank you so so much for this explanation , .but I couldn’t apply theses rules in some cases such as (C2H5OH)’
    Would you please upload a video on this case and other cases.

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    Thank you

  • sofia star 3 years ago

    Sir Tyler Dewitt can you make a video on concept of valency covalency oxidation number and oxidation state and how these 4 are different from each other

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    My Chem teacher is such a sweet lady, but she doesn’t teach us nearly as much as you do

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  • Rayan Talwar 3 years ago

    Good video.Very helpful

  • DAWN 3 years ago

    I had a hard time understanding this lecture from my prof and i’m amazed ’cause I’ve learned it here easilly. Thanks man!

  • SathyN S 3 years ago

    What is meant by neutral compound.

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    10:38 : BrO3 minus…

    • MathewSJ 0629 3 years ago

      Bruh…

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  • Sanjeev Sharma 3 years ago

    This video time duration is small but it is more helpful than other 1 hour videos on YouTube

  • Eccentric Zully 2 years ago

    THANK YOUUUUUU!

  • vitthaldas jaju 2 years ago

    what about cucl2

  • ian rey sarona 2 years ago

    You made it very simple thank you so much

  • Aayush Jha 2 years ago

    YOU ARE AMAZING

  • Leslie Beck 2 years ago

    At the beginning of the video you reference a video called “What are Oxidation Numbers?” Can you provide a link to that? I can’t find a video by that name posted by you. Thanks!!

  • jolene Lever 2 years ago

    THANK YOU 😢 my chemistry professor makes it look very hard but you made it very easy to understand.

  • Julius Nool 2 years ago

    Thank you so much, now I’m ready for Redox.

  • Alishba Arshad 2 years ago

    They’re teaching us this in 11th grade AKA 3rd year of o’levels. What grade are you studying this in?

  • Fahim Mahmud 2 years ago

    Hi Tyler, superb videos.
    I can’t find your video on what is oxidation number. Would you kindly provide the link?
    Thank you!

  • JenZob 2 years ago

    Honestly, thank you so much for this video. Very much appreciated! You made it so simple to understand!

  • My Nigga 2 years ago

    Over a million views and only 24k likes…. dislike this comment

  • Hexproof 730 2 years ago

    It’s a little surreal seeing a chemistry teacher taking their time with what they are doing and not flying through everything. Also, I assume a compound with Oxygen and Fluorine would have the oxygen as positive? Or would it be +1 or +2? I assume +2 but I Just want to cover all bases here.

  • MEGAN MCDONALD 2 years ago

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    Can you teach my college lecture please and thank you

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      Early comment so I liked

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    Sachin

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  • J Padda 2 years ago

    What KO, if O is -2 can K be +2 or does it have to be +1?

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  • Karen Southydeth 2 years ago

    wow…i struggled with this in class the other day and was so lost because of the way my professor was talking so fast and explaining it that just watching this video, i now understand how to do oxidation numbers ; u;

  • Anita Baidoo 2 years ago

    OMDS 😱😱. Thank u so much. I have never loved chemistry so much until I watched this video. I was finding it too difficult in class but u have made it understandable. Continue this hard work u r really helping of thousands of people.

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  • joseph sibin 2 years ago

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  • Nan S 2 years ago

    Hi Tyler, Can’t find the video called “What are oxidation numbers”

  • Billy Highfill 2 years ago

    Thank you tyler!!!!

  • Moshe Telles 2 years ago

    When we all get good jobs, thanks to mastering chemistry, let’s not forget to donate to Tyler who is continually helping us to learn and master the subject. Thank you so so much!

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    I was SO lost when we covered this topic in class. At the end of this video, I was doing the problems on my own. Thank you!

  • Grace Wiley 2 years ago

    If you have to multiply by subscript shouldn’t that change the oxidation number to the number you needed to make the oxidation charge 0?

    • Grace Wiley 2 years ago

      Anyone that knows that answer could please answer that question would help, please and thank you.

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  • Mubiena Namli 2 years ago

    How to know if the compound is neutral?

  • Demon 2 years ago

    Thanks you so much man u r explanation is the best!!!! Make more videos !!

  • zeta sky 2 years ago

    So for the example at 8:45 is the oxidation number of 2 oxygen -4 or -2?

  • Vismaya Lullu 2 years ago

    Hey you are such a great man on earth god always and always bless you … Love you from india

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    Best teacher that I have ever seen

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    I really hate chemistry and sometimes cry in class because it is being like a phobia, but your videos help me a lot before my IB exams, thank you.

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    I remember finding this channel my towards the end sophomore year of high school when I had to take chem. I literally did not understand any of the class but this guy really helped me out in the end. Now I’m in my first year of college as a nursing major and I can honestly say no one else could ever explain things simpler than him. He actually makes chemistry really enjoyable and I really like the science that I HATED when I was in high school. He’s so great!

  • Cirque de Freak 2 years ago

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  • Yaya Hamby 2 years ago

    what happens if you put fluorine with oxygen? or is that not possible?

  • Ullash Deewan 2 years ago

    no one could have explained better

  • MAGhack Gaming 2 years ago

    How we configure if a compound is neutral or not

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  • Eisha Ashraf 2 years ago

    You are great sir😀😊

  • Wafiya Nesreen 2 years ago

    Thank you sir a lot…You are a good teacher ever.May ALLAH bless you to post many more videos to help us in our studies…AMEEN…

  • Albasher Uddin 2 years ago

    NaCO3? Carbon with a +5 oxidarion state??
    NaCO3?? or is it Na2CO3?

  • Vidhya Romiyo 2 years ago

    Thanks a lot

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    You are great sir❤❤

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  • VGem 2 years ago

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  • Chan Ken 2 years ago

    What is the oxidation number of N and Cl in NCl3?

    N = +3, Cl = -1
    or
    N = -3, Cl = +1
    ?

  • MD FARUKUZZAMAN 2 years ago

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    Beautifully explained

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    no body want low mark; everybody wants to get high mark, but the problem is with the bad teachers who hate the student or they can’t help the students

  • Digbijoy Yadav 2 years ago

    But where was your video what are oxidation no. as you mentioned in your video???

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    This man is a straight up chemistry gangster!

  • Kavin 2 years ago

    You the man

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    Thank you so much for your help , you really helped me so much cuz I skipped the lesson today lol

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    I learned nearly nothing about that from my teacher,u made it so easy and clear 😀

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    This is my first time on this channel: it is such a wonderful explanation .

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    Why did you divide the oxidation no. Of carbon but not the hydrogen which was h3 and c2 for carbon

  • Danica Montaniel 2 years ago

    thank you so much,,, u truly r god-sent!!!

  • LiconC 2 years ago

    I feel like this dude just smokes a small amount of weed before he lectures.

  • kap849 2 years ago

    He should have said “If you learn my way, you will realise you have a really crappy Chemistry teacher.’

    • SJ - 11PM - The Woodlands SS (2372) 2 years ago

      I agree 100%

  • Victoria Aboyeji 2 years ago

    U are a huge blessing to all chemistry students

  • Michael 2 years ago

    god blessed me by coming across this video I got my exam results and got 98% out of a 100% i am going to give you full credit because of your amazing teaching skills

  • Samantha Randall Bley 2 years ago

    I’ve been stuck and feeling discouraged on this subject for hours. This one short video turned that around completely! I swear it’s not just the concise and tidy way you teach but the upbeat way you speak when you do it. It’s contagious. Really, really appreciate it!!!

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    I love chemistry because of you 💔❤️😘

  • Sarah Uddin 2 years ago

    I’m a chemistry tutor. MAD PROPS ON YOUR TECHNIQUE. I send my students your videos to review what we’ve learned in our tutoring sessions.

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    thanks for your video, it really helps

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    Finally a competent teacher who knows chemistry! Thanks for sharing

  • Itsme._. rosy 2 years ago

    OMG thanks you sooo much!!!! I was sooo behind in class, as i just couldnt understand the oxidation numbers, and this one video made me understand!!! thank youuuuu!!!!!

  • MathsWithYas 2 years ago

    you are amazing teacher

  • Tahleea D 2 years ago

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  • Teju Thomas 2 years ago

    Sir one doubt when it is HOF the oxidation no. for F is +1 how?

  • Julio Ramirez 2 years ago

    You’ve taught me more in a 13 minute video than my chem teacher has taught me all week

  • Park Mochi 2 years ago

    Man you’re so good at explaining, I literally get everything you say

  • Sienna 2 years ago

    very good teaching but could you give us some practice questions to help us become more comfortable with redox equations please 🙂

  • Tristan 2 years ago

    Im confused right off the bat. Is Na not monatomic? Why do the rules change there.

  • Tristan 2 years ago

    is it always 1 or is it zero

  • Zedl3x 2 years ago

    reason why ill pass chemistry thanks so much 😀

  • torako89 2 years ago

    I can’t find the video referenced here “What are oxidation numbers,” can anyone provide a link?
    I’m really struggling with this concept and my test is coming up! TT_TT

    • Camille Acero 2 years ago

      torako89 same hereee

    • bratan TM 2 years ago

      Well i found it but guess i am too late

    • Paul Jacobs 2 years ago

      @bratan TM Can you please share the link to the video? I’ve been search all morning and haven’t been able to find it. Thanks!

  • JackSkxllxngtxn 2 years ago

    you teach so much better then the rest man. If i had you as a teacher in biology and chemistry a few years ago I would have saved thousands of dollars and what ultimately amounted to a years worth of time.

  • ItsJustCJ 2 years ago

    Eddie Brock I can’t thank you enough for your videos man, makes school a lot easier!

  • Sharodiner0 2 years ago

    thanks a mil !

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    You are the best chemistry teacher…😊

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    great job man..
    any sri Lankan here..!
    please let me know.
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  • Sammy White 2 years ago

    Are you related to Booker DeWitt from Bioshock Infinite

  • Hardcore_gamer145 2 years ago

    50 minutes before test

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    Thanks for breaking it down Tyler. Sometimes college upgrades can be quite the stretch as we need to cover a lot and so a lot of times, instructors would speed things up leaving us more confused than ever especially now that most school are on an alternate method due to COVID19. Thank you =) again

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    Thanks man helped a lot

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  • Evelyn Quinones 2 years ago

    Trying to figure out the oxidation number or 2Fe2O3 to 4Fe. From the reactant start it is 3 but when it is alone is it a free element or monotonic? Is it still 3 or 0? And if it was 3C > 2CO2 would carbon go from 0 to 4 for being a free element or monotonic? I’m so confused with all of these rules. And can you have a equation where two elements are unchanged in oxidation numbers and one is oxidized?
    My equation: 2Fe2O3 + 3C > 4Fe + CO2

    • ChemSimplified 2 years ago

      When you have the element all by itself, without any charge, that makes it a free element. In your example, they are Fe and C.

      If you have an ion that consists of only 1 atom, that’s monoatomic ion. For example, Fe^2+ or N^3-.

      Answering your question on oxidation number,
      Fe2O3 –> Fe, Fe’s ox # goes from +3 to O, making this a half-red eq
      C –> CO2, C’s ox # goes from 0 to +4, making this a half-ox eq

      In a redox eq, you can have elements with unchanged ox #, however, there should be one element with increasing ox # and another element with reducing ox #.

      Hope this helps.

  • Esmeralda Hernandez Porcayo 2 years ago

    in the CIF3, why ignore the I is it because F is also a halogen and we need to focus on ONLY one halogen if we get two in the same problem?

  • daniel Aj 2 years ago

    you do not have a video titled “what are oxidation numbers” -__-

  • Swara Pawar 2 years ago

    those who dislike are jealous of him and are from the coaching institutes

  • Night Strider 2 years ago

    i bet your views spiked during this year

  • Fofo 123 2 years ago

    Four years later and still watching this video. Thank you for helping students understand Chemistry. I love how you are smiling throughout the video. I wish we could all find someone who looks at us the way you look at chemical equations LOL.

  • RAM 2 years ago

    U help me so much bro thx so much

  • Julita Aishah 2 years ago

    Sir,in malaysia we have to close the school because of coronavirus. I am SPM’s candidate. (spm is really hella important in our country because this can allow us to continue our study further in chosen university). I had watched a lot of your video sir. It really helps me a lot and i can be able to finish my syllabus by my own. Thanks sir,you really help me in SPM.

  • Esther tttelllus 2 years ago

    I am baffled how many dislike this video got. I mean if you can’t understand this simple lecture, I dont know what else can save you. The way this man break down his lectures is so clear, and this is coming from a person that’s suck at chemistry. Last time I took a chemistry class, I barely passed that class with a 71%. I just wish I stumbled into this video sooner.

  • Maya Addams 2 years ago

    I have an exam tomorrow and this video helped me some much. I’ve been wracking my brain for hours trying to figure it ou.

  • marie garcelon 2 years ago

    this channel is absolutely saving my butt for MCAT chem!

  • Shazia Mohiuddin 2 years ago

    the way you simplifies chemistry is really awesome. good job.

  • Aditya srivastava 2 years ago

    Are u Australian

  • Miguelangel Castro García 2 years ago

    u saved my life

  • Diego Ordonez 2 years ago

    you do a really good way of explaining this topic *thumbs up*

  • SuperEvith II 2 years ago

    Chemistry teachers refuse to explain things this simply 💀💀💀

  • Noela M 2 years ago

    Helping me pass college Chemistry during quarantine!

  • Anti Matter 2 years ago

    Why is the oxidation state of Na 0 if its also a monatomic ion, shouldn’t it be +1?

  • Sjanvi Kgupta 2 years ago

    thanks : )

  • روحي تحيا بالقرآن 2 years ago

    Thank youu you helped me alot! 💗

  • Somebody 2 years ago

    Thanks, this video helps me a lots!

  • Anuradha Vijay 2 years ago

    I am very new to Chemistry but the way you have explained , no words to express.Such a simplified way of teaching , I have never seen with anyone.Keep up your great work and lovely teaching Sir.

  • Dade Goforth 2 years ago

    What about an ionic compound such as Al2S3?

  • Andres Nuno 2 years ago

    Isn’t MgO technically a peroxide because there is one oxygen and one magnesium

  • Daria St 2 years ago

    yes, a very good teacher + handsome

  • Christopher Granhof 2 years ago

    A little confused about 8:40 where NO2 was not a peroxide since there were two oxygens is there something im missing?

  • Max Nguyen 2 years ago

    What if you have a compound of having Fluorine with Oxygen? Will the Fluorine have a charge of -1 or a positive charge?
    Tyler can u help me?

  • Bidyanand pandit Pandit 2 years ago

    Your teaching skill is very amazing for me to write good answers in board examination

  • ryan gioe 2 years ago

    That was a great way of explaining oxidation numbers!

  • Neelu Gupta 2 years ago

    Sir can you give me the technique to learn the periodic table.

  • flzerocs 2 years ago

    You made something confusing look so simple…

  • Ali Qazi 2 years ago

    tha

  • Bunny Dream 2 years ago

    I love this man so much I could kiss him.

  • Lucy Martin 2 years ago

    thank you! superb explanation 🙂

  • Classical utubr Bhavesh 2 years ago

    U are the best teacher

  • WideBoi 2 years ago

    Ey man I hadn’t a clue until now u brings a tear to my eue

  • Familyoffour 2 years ago

    You know you’re learning when the videos over and you like wow that’s it. That’s all there is to it ?? Hahah who’s studying during quarantine ?!

  • Ella & Adagio 2 years ago

    oh my gosh, thank you. My teacher is horrible and my textbook just threw a bunch of random ON rules at me without really organizing or explaining them. you’re a lifesaver!!

  • Abdul Hannan Anik 2 years ago

    Thank you sir

  • Thamer Otibi 2 years ago

    Best

  • Yasmine Salem 2 years ago

    What program do you use to create this video and split screen to show how you solve?

  • VC 2 years ago

    My chemistry professor just linked us students this video instead of creating her own lecture! That’s how good this is

  • Keyla Auikyani 2 years ago

    This was uploaded 4 years ago, and it still saved my life, I’m subscribing out of sheer gratitude

  • Justiññ Miles 2 years ago

    EXTRAORDINARY TEACHING 👌

  • Classifier_66 2 years ago

    An alternate reality where James from theodd1sout becomes a teacher

    • seikkatsu 2 years ago

      wish more people would get it

    • Carter Gillespie 2 years ago

      lol i see it

  • Anand Kochhar 2 years ago

    No offense..but u look like Sheldon

  • NXO 2 years ago

    It was a really great video. It is impossible not to understand the subject. Thanks a lot !!

  • Kaitlyn Flanagan 2 years ago

    great video

  • Thirumurugan M 2 years ago

    Hi Taylor….. really awesome mate … I understood the concepts.but have a doubt. How to find the neutral compound it ion charge?? Could u pls clarify me?

  • Litamusicofficial 2 years ago

    He makes it so easy

  • Evan Toth 2 years ago

    Solid video, btw has anyone said you look like Fred in the live action scooby doo movies

  • Morty Smith 2 years ago

    He’s all like you’ll get it right 100%of the time cause it’s the same rules*right you don’t know my teachers

  • Xiang Zi Bee 2 years ago

    Ions and oxidation numbers, are they the same?

  • Shenille Surmat 2 years ago

    Thanku for everything, your time and effort into this video. Your videos are always helpful to me. ❤ from Vanuatu…

  • sai karthik rajan 2 years ago

    thanks a lot for all of your chemistry lectures as it has helped me in improving my interest and understanding for chemistry

  • mahnoor sohail 2 years ago

    NH3+O2 react N2+H2O please video acideic medium

  • Anita Ohene-Darko 2 years ago

    You;ve got me through this .Thanks

  • Mariah George 2 years ago

    you are a king

  • Tuhina Behera 2 years ago

    You really are a great teacher. Cleared every little detail

  • Sabrina R 2 years ago

    thank you SO MUCH for this… my textbook chapter on Redox reactions didn’t explain this part at all

  • Akansha Yadav 2 years ago

    Best sir in the world

  • Wain DY 2 years ago

    Hydrogen usually +1 with non metal

    With metal it’s – 1

  • Wain DY 2 years ago

    Oxygen usually -2 however in

  • 11 th IIT jagh Dheep 2 years ago

    good and clear

  • Dominique Neary 2 years ago

    13:01
    05:02
    10:49

  • Amjad Hussain 2 years ago

    Thanks Man!

  • Payaswini Raje 2 years ago

    Thanks….helped a lot…

  • shiden Habtu 2 years ago

    you changed my life
    thanks very much. you are really my hero

  • jelena obretkovich 2 years ago

    I seriously love you you have no idea 😂 I’ve been trying to understand what’s been going on in class for a couple of days but you explained it so nicely. Super organized. Thank youuu

  • A R 2 years ago

    I do not understand for halogens with oxygen

  • syz hfa 2 years ago

    You save my life

  • abdullah al hayek 2 years ago

    All what my teacher do is shout and complicate stuff up. After you, complication doesnt exist

  • 015 Clifford Jestin 2 years ago

    Thank u sir it really helped me

  • renuka mainalimainali 2 years ago

    Great

  • Anneliese Rosenbaum 2 years ago

    You know the education system is messed up when this is free and my college chemistry class is $500.

  • Shivangi Singh 2 years ago

    “All this can be different from ur teacher”

    Well he meant better than ur teacher

  • jay ueki 2 years ago

    I guarantee you that over half of all students who has taken Chemistry has watched Tyler DeWitt at least once

  • Vanessa Johnston 2 years ago

    what is the difference between an element by itself and an monatomic ion?

  • hongkongsmartboy 2 years ago

    How about the compound of Nitrogen and Halogen?

  • sai sri vardhan reddy lingala 2 years ago

    the way you teach…the passion you show and simplest language you use…..makes you an outstanding chemist not a chemistry teacher it”s a scientist………………..thank you sooo much i cant say in words ..but voice must be some what low? can you raise it brooo.excellent explanation

  • Glorifaed 2 years ago

    You are the backbone of our society

  • Minawe Octavia 2 years ago

    🏆🏆🏅

  • The education elixir 2 years ago

    PLEASE MAKE MORE VIDEOS PLEASE DO! I WOULD DONATE AS MUCH AS THERE IS IN MY PIGGY BANK I PROMISE

  • FERNANDO LÓPEZ GONZALEZ 2 years ago

    Amigo soy de México, apenas hablo inglés pero me es suficiente para comprender lo que dices. Eres un excelente profesor, entendí todo lo que enseñaste. Muchas gracias

Comments are closed.