Electrochemistry
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- Опубликовано: 28 июн 2024
- How does a battery work? Now that you think about it, you have no idea, do you? Well take a gander! Turns out it's just redox chemistry.
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Thank you Professor Dave! Our professor "forgets" to explain a lot of the basic concepts for a chapter, leaving us confused when she goes on to more complex parts of the chapter. Your videos are brief enough for me to watch them before lecture so I can understand and visualize basic concepts.
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What i struggled to learn so much time u taught it in less than 5 mins. Truly AMAZING Thank you so much professor dave
Thanks professor you will never now how much you helped me through your short videos
When this video was posted I was in the 9th grade,and now I’m in first year med school…and it’s helped me SO much!!
Just want to thank you! Med school so far hasn’t been easy lol,but these videos are making it a whole lot better!!
Your are awesome, I am using this to reinforce MCAT material. Your videos are straight to the point, no fluff. I commend you good sir.
Anwar Dhama
Nice; hope you did well!
so helpful man, this chapter is filled with direct words, had missed a few definations leading to confusion, really you made it so much clearer and easier : ) thank you !
These videos are great when i need to refresh my memory about a-level chemistry during uni
I cannot thank you enough Prof. Dave! like you are a lifesaver!!!
thank youuu!
Best revision material ever
Excellent teacher!
Thankyou for your great explanation in short time
Thank you professor ... your videos are very helpful
Left oxidise anode negatively=LOAN.. simply easy to distinguish the anode.
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Tq very much dave sir my aim is to become scientist ur videos r soo clear for me
Thank you professor Dave
A real chemist... Sir you are great your lecture have no confusion.
Electrons flow from low electric potential to high; the opposite of what you said @ 2:50.
conventional current will flow from high to low voltage
Professor Dave is this accurate?
I need help with electrochemistry and to study for my chem 2 final?
When you support someone From start and then you on this stage really feeling proud of you bro❤️💓
Professor Dave,
I thank God for your existence.. I gain lots of knowledge from your videos~~
Would like to see you cover cyclic voltammetry and chronoamperometry
greetings professor! i kinda wonder why the electrons lost by zinc dont go to the bridge first? how could they make a choice? thx alot
Amen to you Chemistry Jesus
Thank you professor ❤❤
Don't negative charges flow from a low to a high potentials and positive charges the other way around?
yes!
How come at 2:50 you say that electrons flow from a high to low potential?
yikes, perhaps i meant energy instead of potential, i'll look into it
Thank you J
omg I finally understand😄Thanks!
Thank you!
great help
is it constant for cathode to be on product side and anode on the reactant side?
i literally gave up studying for the day and decided to watch your videos to maybe get a bit of education, but then while watching i felt like instead of tiring out from studying i instead have to start writing stuff down as it all made sense without effort.
Thank you so much!!!
Please help with electrochemical series !
how does professor dave teach me a topic in 5 minutes better than my teacher does in 5 days of 45 minute lessons
great sir
Thanks Sir
For the Ecell, why didn't you change the sign of the anode to positive 1.66. The chart shows negative 1.66 for Al3+ to Al(s) which is the reverse of the anode in the problem at the end. So wouldn't you flip the sign since the reaction is flipped?
Do you know basic math?
its nice to watch
1:30 are the plus and minus signs above the electrodes the wrong way around? Cathode is negative and anode is positive
No, other way. The video is right.
So if you flip the sign of the reduction potential you get the oxidizing potential for a reaction?
Yup
This man actually makes me wanna learn chemistry and not just mug it up :p
Thanks :)
Dave, isn't that the electrons flow from areas of low electric potential to high electric potential?(you've mistakenly said the reverse)
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i don't understand this at all
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@@Js4ngon god
You need to learn more basic concepts.
So I need to leave some more basic concepts
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Sir can you please make a video on polarography technique-introduction, polarographic cell, polarogram, working of polarographic cell, Dropping mercury electrode, supporting electrolyte, role of supporting electrolyte and on cyclic voltametry technique
sir in electrolytic cells we consider anode as positive and here we dont. is there any reason for that?
in electrolytic cells a current is used to drive an otherwise nonspontaneous reaction, whereas in a voltaic cell a spontaneous redox reaction is used to generate a current, so it's the reverse situation in terms of electron flow
well explained tq
Can you explain about Standard Oxidation Potential and Standard Reduction Potential??
that's in this clip you're commenting on.
Professor Dave Explains thanks
Sir help me in finding Ur more videos about electrochemistry
incredible
Could you explain how you got that Ecell? Isn't Fe +0.77?
nope, it's -0.44! look it up.
Oh sorry, I was looking at Fe3+ instead of Fe2+ in your list.
This does not explain an ice tray battery right?
Thanku
U look twin of ranbir kapoor the Bollywood actor
No he looks like professor Jesus Jr. ;)
Good
why zinc atom ionize in its solution
it doesn't, the atoms in the electrode ionize, and then the ions enter solution.
great
thanks man 100% incoming
Which book is best for chemistry and math for class 12
all in one for maths and NCERT textbook for Chemistry
yes
For the Ecell, why didn't you change the sign of the anode to positive 1.66. The chart shows negative 1.66 for Al3+ to Al(s) which is the reverse of the anode in the problem at the end. So wouldn't you flip the sign since the reaction is flipped? pls answer ty
we don't manipulate the reduction potentials when calculating Ecell, we just plug them in directly
I agree with jjdh911 dexter that it's easier to just think "I SUM the energies of the proper half reactions" and then flip the reduction half reaction as needed then try to remember which one to subtract. It's not manipulation; I was taught to do it that way. I try to avoid memorizing whenever possible!
More discription
Why the charge on anode is negative
Because that's where oxidation takes place.
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good cap Dave
The Nerd's Equation 🤣🤣
Ugh why did I thought that kathod is - and anode is +?
It is, just not for voltaic cells. That is because the flow of current is reversed
anode is + and cathode is - not the other way round
This video is correct.
Professor Dave is correct - for galvanic cells.
I'll bet, though, that you are dealing with electrolytic cells. An anode is where oxidation occurs. It's mind-frying because if you want to induce oxidation at the electrode -say oxidize the electrode itself from metal to ions in solution, the basis for electropolishing - you hook up the *positive* terminal of the power supply to the electrode. Positive sucks out electrons from anything at the electrode surface
Conversely, to drive reduction (reduction = cathode) such as electroplating, you hook up the negative terminal to the electrode you want to plate. Negative feeds electrons to anything at the electrode surface, such as metal ions you want to reduce and plate on the surface.
I once knew a guy doing stress corrosion cracking studies on stainless steels. He told me that he set up electrochemical test cells by going through the thermodynamics and the equations, then hooking it up exactly the opposite. It never failed him.
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The final answer is -1.22
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Super 👌👌👌👌👍teaching
Straight stuff.
U r grt 😎
anode is + and cathode is -...
not for a galvanic cell! perhaps you're thinking of an electrolytic cell.
That's on electrolytic, on volatic cell we got the opposite
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How is it so that near the anode oxidation takes place? Anode is positive (I don't know why but it is positive right?). So it must attract anions. And what do anions do? They accept protons. Which is equal to reduction.
I can't get it please. Teachers in Bulgaria are horrible at explaining even these simple stuff and all they do is confuse students. Help
No no, at the anode neutral atoms are oxidized. The electrons move through the wire to the cathode.
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If you fail your test after watching this , you should know that the problem is with you , not with the subject , myself included hahaha , it can't get any simpler .
yeah buddy
Lee
thank you science jesus
am i the only one who is not fully understanding the exact details of the whole subject
Chat r we cooked
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Thank you chemistry Jesus
I am a salt bridge without an voltaic cell.
i’m cooked
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Thanks i don't understand any thing 😢😂💔