19.2 Balancing Oxidation Reduction Reactions

Struggling with Balancing Redox Reactions? Not to worry, Chad breaks down exactly how to balance Redox Reactions and identify oxidizing and reducing agents!
00:35 - Problem #1 (Balancing Redox)
11:22 - Balancing in Base
14:02 - Problem #2
25:33 - Problem #3
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Happy Studying!

[@thenightdances21]

Your videos are a life saver!! Thank you so much! I seriously wished I would have found all your videos earlier but I will be watching your a lot of your video to help me prepare for lecture because my university chemistry department is a nightmare!! I’m in general chemistry II

[@avrohomhousman5958]

i think everyone watching this video is in general chemistry II

[@hazzy5447]

What I once felt was frustrating and confusing has become understandable and even enjoyable to solve thanks to your videos. Thank you!

[@ChadsPrep]

You're welcome, Hazzy - thanks for saying so.

[@joshg308]

this was such a good video. thank you for posting. on a different note your voice is a good teaching voice. it doesn't sound like nails on a chalkboard or a high pitch witch voice.

[@ChadsPrep]

Thanks Josh! Oddly enough I was in the middle of giving this same lecture live when I saw your comment and it gave me a good laugh!

[@devikanair44]

what a process! thanks for explaining it so methodically!

[@ChadsPrep]

Glad it was helpful, Devika, and thanks for your comment!

[@libbygrace9375]

ugh your back must hurt from carrying my chem grade on it all semester

[@ChadsPrep]

Love the wit Libby! But nope...light as a feather!😜

[@lizharding2411]

Take a shot every time he says “cool” 🥃

[@ChadsPrep]

Ha! You better have a high tolerance!!

[@avrohomhousman5958]

your videos are excellent. BTW im taking organic chemistry next semester, do you have videos on that?

[@brendanborn2356]

another awesome vid Chad, thanks

[@ChadsPrep]

Thanks Brendan! Glad you found it helpful!

[@coolkid9206]

How would I find the oxidation half and reduction half when the final outside charge don't change?

[@roxannahymanson7115]

Love your videos! I have been watching every physics and gen chem video for the mcat, For the second example, we did not have to balance out anything with the transition metal Mn, but why not if its charge is Mn7+ and Mn2+ ? Is it because Mn can exist as Mn 2+? Also, when we add the 5 electrons, why is it not 7 electrons? Is it because we added the -2 + our +7 to get +5 and then needed to add 5e' ? Thank you :)

[@ChadsPrep]

First, the Mn atoms were balanced to begin with...1 on each side. Second, you can determine the number of electrons in a couple of ways. You can use electrons to balance out the total charge on both sides of the half reaction which is the method I used. All the reactants had a total charge of +7 and all the products had a total charge of +2. By adding 5 electrons to the reactants side now both sides would have the same charge...+2. Hope this helps and best in your studies!

[@michaelisakov1108]

Why was the original electrical charge excluded from the original equation when it was brought down to the half reaction?

[@samuelakalewold4870]

thank u very much it means a lot to me

[@ChadsPrep]

You're welcome, Samuel - glad you found our videos!

[@wealthhealthco.9018]

Hey Chad, how do you know if its an acidic or basic question ?

[@ChadsPrep]

The question may plainly state to balance "in acid" or "in base" or if you see H+ written as part of the reaction then balance in acid, or if OH- is part of the reaction then balance in base. There are also reactions that don't have H+ or OH- in them at all after balancing in which case it wouldn't make a difference and you'd get the same result either way. For these they don't have to indicate the conditions but for all others they need to. Hope this helps!

[@michaelisakov1108]

Where do u teach?

[@christinenguyen856]

In the first example, how did you know Pb is +2

[@codygruberg7294]

group 2 metal

[@갱갱항상]

theres a mistake at 6:46 that was killing me. the number of H+ ions is NOT 2, it's 4. dont fall into that trap guys. always check how many hydrogens you have on the other side

[@ChadsPrep]

Hello Shahad! Look back at it again. Before we added the H+ ions to balance there was 1 mole of H2O2 on the reactants' side (2 H atoms total) and 2 moles of H2O on the products' side (4 H atoms total) which is why we needed to add just 2H+ on the reactants side to balance them out. Hope this helps and Happy Studying!

[@갱갱항상]

@@ChadsPrep aw man :(( thank you for explaining

[@abdalkhaliqmohammed8538]

grazie signore

[@ChadsPrep]

You're welcome Abdalkhaliq! Glad you found the lesson helpful!

[@abdalkhaliqmohammed8538]

@@ChadsPrep absolutely useful but for organic chemistry please make a video about suffix , prefix and functional group together . that way we can recognize the names better . loves from italy

[@abo300f6]

The first one he gained 1 only wtf