How to Balance Redox Equations in Acidic Solution

Published on June 18, 2015 by

We'll go step by step through how to balance an oxidation reduction (redox) reaction in acidic solution. Most importantly, both charges and atoms must balance. Here are the steps: first, calculate oxidations numbers for all the elements in the equation. Next, figure out what is being oxidized and what is being reduced. Then, write half reactions for the oxidation and reduction. After that, balance each half reaction: first, for the atoms other than O and H, then for O and H, and finally for charge by adding electrons. After being balanced, the oxidation and reduction half reactions are ready to be added back to together. Make sure that the number of electrons is the same in the oxidation and reduction half reactions. If they are not, multiply one or both of the half reactions to make the number of electrons the same. Then, combine the oxidation and reduction half reaction, canceling out stuff that appears on both sides of the equation. Lastly, do a final check to make sure that everything balances: both atoms and charge.

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  • Loryn Y 2 years ago


  • Anita R 2 years ago

    Why can’t you cancel out the 3Ag on both sides?

  • akil ahammed khan 2 years ago

    can you please helo me to balance a redox reaction ?? PbCl2 + HIO3 + HCl = PbCl4 + HI

  • مَريَم 2 years ago

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  • Violet Khosh 2 years ago

    this dude is the best at explaining, wish he was my chem professor

  • Vismaya Lullu 2 years ago

    Thankyou sir lam from india kerala love your classes heartfelt thanks

  • AbdelRahman Shaheen 2 years ago


  • Stephen Corley 2 years ago

    Why can you cancel out the 3Ag and the 3Ag+ at the end?

  • avenger endgame 2 years ago

    Thank u sir 👍

  • Hafte Hailay 2 years ago

    i have full knowledg with yuor help thank you

  • Ghetto Filipino 2 years ago

    Tyler the goat

  • RD Austin 2 years ago

    There are absolutly no words to describe how effective your teaching methods are…. No matter how many times my teacher showed me how to solve these problems I never understood. You are the G.O.A.T! It’s 2019 and your vids are helping so many people, please resume making vids Tyler, you are the best!

  • Justine Torres 2 years ago

    if you balanced an equation that has excess H+ and H20 on both sides of your equation, can you cancel them out as well?

  • Layan Alzahrani 2 years ago

    Thank you so much i love youuu♥️

  • Ayush Sharma 2 years ago

    Sir could you tell me why in this equation given in ncert
    2H2O +2SO2 +O2 —->
    4H+ +2SO42- +2e
    Sir can you help me to understand this equation , why we are adding +2 electron on RHS as we can see that charge on both side is 0
    That is ,
    0 = 4 + 2(-2)

    Plz help sir !

  • Filtiarin 2 years ago

    This just saved me from failing chemistry! So much better than how my teacher explained it 🙏👍😁

  • Shanna Cullen 2 years ago

    Can you explain this question please and thank you:
    Write a balanced total and net ionic equation for the reaction between aqueous solutions of calcium hydrogen carbonate and hydrobromic acid.

  • Deanna Torres 2 years ago

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  • Prand cess 2 years ago

    Thank you for your explanation 🙏I can pass my exam bcuz I understood about this clearly from you 😍

  • Captain Obvious 2 years ago

    3:49 He said “one” but voiced over “2” to correct. Almost didn’t catch it

    • Lira24 2 years ago

      Wow. Noice observation skills!

    • Music Composer 2 years ago

      Lira24 you have terrible observation skills…

  • Navya Gupta 2 years ago

    thx a lot.

  • Monzume 2 years ago

    0:27 did anyone else hear a baby crying

    • Areeb Ahmad 2 years ago

      Bro, how did you notice! Are you playing it on a subwoofer?

  • Lorena Cardona 2 years ago

    AMAZING. thank you!!

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  • Aisya Reza 2 years ago


  • Allie W. 2 years ago

    i’ve learned more from him then i did the teacher i paid for… RIP

  • Kynt Rodriguez 2 years ago

    I’ve tried to solve the problem in the introduction and it turns out, the result which i got is 7Fe^2- which too far from the given result of 5Fe^2-😂can you help me with this one sir? Thanks a lot🙂

  • Victoria P 2 years ago

    Good and well understandable

  • Mohd osman Abdi 2 years ago

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  • joevic tabligan 2 years ago

    can discuss electro coagulation what happens during Electro Coagulation

  • Busy World 2 years ago

    You balanced these reactions in the way that I didn’t get confused I’m so happy that now I can balance a redox reaction Love you Tyler plz plz plz plz don’t stop making videos We’ll always support and like your videos 😌😍😊

  • Baibhav Sinha 2 years ago

    Sir plzzz can you make the videos related to organic chemistry?

  • Kem Bun Heang 11E 2 years ago

    Thx you very much with your help. I can understand it better.

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    9:22 definetly not a math channel

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    Thank You! Your videos are very helpful. Please continue doing helpful videos.

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    more than amazing teacher, your work is simple, clear and very engaging.

  • afra fathima 2 years ago

    Thank u sooo much…..

  • Aditya Menon 2 years ago

    Thanks a bunch

  • Aryan Shahu 2 years ago

    thanks for caring about teaching chem more than my chem teacher

  • koksyforChrist 2 years ago

    In 2020, you are still rescuing chemistry students. Thank you

  • Mohamed Sufeeyan 2 years ago

    Ur great😍

  • stiles stilinski 2 years ago


  • cameron pegram 2 years ago

    How do you know if it’s an acidic solution?

  • INNO DOLLARs 2 years ago

    I thought reduction is when an element gains electrons

    • ChemSimplified 2 years ago

      anything everything You’re right. When a substance accepts electron, it undergoes reduction.

  • Leena E 2 years ago

    Anyone else freak out at his arm at 1:30?

  • Madison Xanders 2 years ago

    For the oxidation number, why is oxygen -2 and not -6? Wouldn’t we use -6 because 3 times -2?

    • ChemSimplified 2 years ago

      Madison Xanders When we write the oxidation number, it’s always for 1 atom. That way, we have a fair and easy comparison to see if oxidation number increases or decreases going from reactant to product.

  • Aldair Velasco 2 years ago

    You and the curve to my chem class are the reasons why I have an A

  • Ann 2 years ago

    I am watching in yr 2020 and your videos have helped me soooo much! I am taking online chem and it has been a struggle! The videos my teacher post just do not make sense and you break it down with even smaller steps which is how I learn I need to know exactly how something does something or else I am totally lost! Thank you thank you!!! 🙂

  • ITGA MAXAAD KA TAQAAN 2 years ago

    You helped me,
    Something did not understand my teacher.
    Thank you

  • Krish Bansal 2 years ago

    Thank you so much

  • Karen Molyneux 2 years ago

    how to balance NH3+NO2-N2 ???

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    you are truly talented at teaching; thank you so so so much for doing what you do

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    Thank You!

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  • rhonda bentley 2 years ago

    why NO -1?

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  • sudhin ps 2 years ago

    A student from india

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    This comment section restores my faith in humanity.

  • Dan P 2 years ago

    What would my redox be on my new battery on my you tube channel. I start with zinc sulphate I add urea and some caustic soda to make the ph 12 then I put that in to the microwave oven to convert to zinc oxide. I then add this to zinc sulphate.

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  • Yashwanth Vignesh 2 years ago

    Sir can u solve this equation
    NO3- + H2S —————> HSO4- + NH4+
    U DID GR8 but I can’t able to do this can u please solve it sir

  • Sjanvi Kgupta 2 years ago

    why so many dislikes :/

  • Jully Ray 2 years ago

    Great. I got all the rules understood. My chemistry teacher does not bother about the rules. She just teaches which nobody could understand. Thank-you Tyler 😊☺


    Ye mein chauthi mein krta tha re Gorey.

  • Emma Swirl 2 years ago

    7:48 wouldn’t you add just regular hydrogen though and not hydrogen 1+? because the hydrogen on the other side was just neutral and not 1+.

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  • Ain Zakirah 2 years ago

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  • nolwazi khumalo 2 years ago

    You the best thank you for helping me due to the pandemic I couldn’t attend classes you just helped me understand this content even better for an upcoming test

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

    Mr. Tyler thou art the lord of wit. Would you consider working at my school please if that’s possible?

  • ♪(v^_^)v 2 years ago

    wow you really made this so simple in such a short video! thank you so much you’re a legend

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  • Swarup pal 2 years ago


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    Kudos teacher.

  • astrophile solitude 2 years ago


  • shiden Habtu 2 years ago

    you are sent by God to teach me.

  • Aamino Ibraahiim 2 years ago

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  • Evelyn Meza 2 years ago

    Ding ding ding!! My lightbulb turned on! Thank you for making it so much simpler and taking your time! Lifesaver and grade saver 🙂

  • Daniel oon 2 years ago

    7:53 why is it 4H+ but not simply just 4H??

  • Rekha Kewlani 2 years ago

    Wait it does make sense, when my teacher was explaining I thought its something made up non sense, YOU SHOULD REALLY BE AT THE PLACE OF GOD RIGHT NOW( I know I am a little overdramatic)

  • Beigoma Academy Math Club 2 years ago

    How many of you are learning this in quarantine?

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  • Karan C Shekar 2 years ago

    thanx a lot man u just amazing ….

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