Physically Constructing a Galvanic Cell (Electrochemistry)

Have you ever wondered how a battery works? It's redox chemistry! A redox reaction is split up into half cells, and you have an oxidation at the anode producing electrons to drive the reduction at the cathode. This flow of electrons can do work, and that's an electric current. This is called a galvanic cell. Of course modern batteries are very complicated, but that's the long and short of it. Let's construct a few different galvanic cells from a few different pairings of half cells, measure the current produced, and see how well it matches up with theoretical calculations!
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[@akuwardmoments]

I'm happy to see my field of interest on your channel! Just something I'll add: If you really want this crammed into your head, there's a song I learned in high school chemistry. They called it the electrochemistry song. Lyrics go as follows:
We start at the anode, electrons are lost there
They go through the wire, and through the load, on fire
They enter the cathode, and reduce the cations,
And the anions cross the salt bridge back to where... WHERE?
(repeat 1000x times)

[@cosmidia]

a new professor dave upload makes my morning perfect

[@pinker4922]

you have sad mornings

[@professionalcatgirl8592]

@@pinker4922 why do you hate comment on his videos so much that’s geek behavior

[@ProbusMihraban]

Procedure:
- Dip the Zn strip in Zn^(2+) solution
- Dip the Cu in Cu^(2+) solution
- Connect the the strips using connecting wires with a lamp / voltmeter in the middle
- Connect the 2 beakers using a salt bridge

[@rostamanFoSho]

Thanks! Also, replace 'voltmeter' with 'ammeter', and it should be "the *current* that's going through". 😊

[@dogwalker666]

Exactly my comment, maybe he had a shunt resistor in parallel 😏

[@waelfadlallah8939]

​@@dogwalker666 hahahaha😂

[@ivoryas1696]

rostaman
The measurement isn't voltage. _I_ used a voltmeter when performing the experiment.

[@dogwalker666]

​@@ivoryas1696 he actually used a DMM but that's too technical for e chemist.

[@jheadley635]

Why use potassium iodide for the salt bridge? It's pretty expensive and a less common compound to keep in labs than say, potassium chloride.

[@JamesVestal-dz5qm]

That's why Lamont made me go home and watch videos and write notes because whatever you want to work that hard on becomes your occupation.

[@ahoybutternutsETF]

great video, students loved it. raving reviews

[@pintohoareau579]

Dave looks different.

[@christinacarter4600]

My students would like to know what your tattoo is?

[@ProfessorDaveExplains]

check "ask professor dave #3"

[@martinarenzi4744]

Thank you so much for this playlist! Super interesting. Please make a series on chem lab quality control and accreditation of testing and calibration lab (like ISO IEC 17025) ❤

[@revatronprime4120]

Thanks professor

[@sciencenerd7639]

thank you

[@ildebrandon6553]

will you do a computer science playlist?

[@ivoryas1696]

IldeBrandon
Somehow, I doubt it, but I wouldn't be flabbergasted if he did. I don't recall seeing him talk about computers too much before, and while I wouldn't be surprised if he knew quite a bit about them, he'll likely continue his current series or go back to help some old ones (like some of the electrical physics videos) first.

[@nafisvai6953]

Hi! I am from Bangladssh
I like to watch your vedio.

[@athuik]

thanks for the knowledge !!

[@rassimsimou1594]

Good

[@maggiehorne471]

Will different salt solutions cause different voltage?

[@waelfadlallah8939]

My man 👍

[@donchristie420]

Don’t they do this to ship hulls?

[@dogwalker666]

In reverse, We fit a sacrificial anode to the metal work which errodes instead of the ship or boat.

[@ivoryas1696]

@@dogwalker666
Huh. I knew that they used a sacrificial anode on things, but TIL that use case. Neat!

[@dogwalker666]

@@ivoryas1696 👍🏻

[@phillyphakename1255]

Did you notice that the zinc erodes into solution while the copper ions are deposited onto the hunk of solid electrode?
Same thing with a boat. We want the ship to not erode, so we find something zinc-ey-er than the steel hull or brass propeller or whatever else on a ship in order to erode instead of the ship.
Zinc is often used for this, but other metals require different sacrificial annodes in order to ensure the ship stays on the left side of the PowerPoint slide.

[@YamenLahham-xm2cl]

bro it still one month and half we finish school

[@jackwt7340]

Try building a hand machine to process aluminum foil?⚙

[@dogwalker666]

I built a hydraulic one for Alcan does that count?

[@TheCosmicGuy0111]

Cool

[@fukpoeslaw3613]

3:27 a salt bridge can be ............. a UA-cam?!

[@harshsinghal4342]

😂😂 it was meant to be U-tube

[@fukpoeslaw3613]

@@harshsinghal4342 😃😄

[@steveclark2205]

Last...

[@whatdoyouexactlymeanbyhandle]

Not First

[@pragmaticcrystal]

👀

[@thedragonslayer8132]

Duh Still haven't constructed life in a lab duh

[@JamesVestal-dz5qm]

Chinese galvanic cells

[@parvladdhaofficial]

sus

[@ProfessorDaveExplains]

wut

[@parvladdhaofficial]

haha I just randomly commented and I’m one of the only people you replied to 😂@@ProfessorDaveExplains

[@Ihsaan1c]

Please hurry up with the DI debunks