Introduction to Galvanic Cells & Voltaic Cells

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  • čas přidán 15. 12. 2017
  • This chemistry video tutorial provides a basic introduction into electrochemical cells such as galvanic cells also known as voltaic cells. A galvanic cell is device such as a battery which converts chemical energy into electrical energy. A galvanic is made using two electrodes known as the anode and the cathode. Oxidation occurs at the anode and reduction occurs in the cathode. The electrons are written on the right of an oxidation half-reaction and they are located on the left side of a reduction half-reaction. Oxidation involves the loss of electrons and reduction is associated with the gain of electrons. Electrons always flow from the anode to the cathode. The purpose of the salt bridge is to prevent the build up of charge. Cations flow through the salt bridge toward the cathode and anions flow toward the anode. This electrochemistry explains completely how a galvanic cell works. It discusses how to write the overall reaction from the half reactions and how to represent the cell using standard line notation or cell notation. The electromotive force of a galvanic cell is measured in volts and 1 volt is 1 joule per coulomb. Voltage represents the work that can be done per coulomb of electric charge. Electric current is the rate at which electric charge is transferred. This video discusses how to increase the voltage and current delivered by a galvanic cell.
    Intro to Galvanic & Voltaic Cells:
    • Introduction to Galvan...
    How To Draw Galvanic Cells:
    • How To Draw Galvanic C...
    Standard Reduction Potentials:
    • Standard Reduction Pot...
    Cell Potential Problems:
    • Cell Potential Problem...
    Cell Notation Problems:
    • Cell Notation Practice...
    ___________________________________
    Concentration Cells:
    • Concentration Cells & ...
    Cell Potential & Gibbs Free Energy:
    • Cell Potential & Gibbs...
    Cell Potential & Equilibrium K:
    • Equilibrium Constant K...
    Nernst Equation:
    • Nernst Equation Explai...
    Electrolysis of Water:
    • Electrolysis of Water ...
    _____________________________________
    Electrolysis of Sodium Chloride:
    • Electrolysis of Sodium...
    Electrolysis & Electroplating Problems:
    • Electrolysis & Electro...
    Electrochemistry Practice Problems:
    • Electrochemistry Pract...
    SAT Chemistry Subject Test Review:
    • SAT Chemistry Subject ...
    Carbon -14 Dating:
    • Carbon 14 Dating Probl...
    Beer Lambert's Law:
    • Beer Lambert's Law, Ab...
    ______________________________________
    Final Exams and Video Playlists:
    www.video-tutor.net/
    Full-Length Videos and Worksheets:
    / collections
    Chemistry PDF Worksheets:
    www.video-tutor.net/chemistry...

Komentáře • 308

  • @TheOrganicChemistryTutor

    Next Video: czcams.com/video/vLCf4_NKjGU/video.html
    Chemistry PDF Worksheets: www.video-tutor.net/chemistry-basic-introduction.html
    Final Exams and Video Playlists: www.video-tutor.net/

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    In case someone hasn't already mentioned it, at 9:14 you mistakenly call the Zn 2+ an anion -- you correct yourself in the following discussion.

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  • @DarkMatterr
    @DarkMatterr Před 5 lety +156

    I always use *Red Cat* to know that Reduction's at Cathode

    • @jackshayne1634
      @jackshayne1634 Před 5 lety +14

      You can use "an ox" as well!

    • @DarkMatterr
      @DarkMatterr Před 5 lety +2

      @@jackshayne1634 yeah learned that a few days later lol

    • @strangeme8164
      @strangeme8164 Před 4 lety +6

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    • @laura79613
      @laura79613 Před 4 lety

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    • @GM.Nobody
      @GM.Nobody Před 4 lety

      That only applies in galvanic cells right?

  • @Rumorthewitch
    @Rumorthewitch Před 12 dny

    been staring at my chemistry book confused for days, watched the first ten minuted of this video and understood. thanks man, wonder how many people would fail chemistry without you.

  • @Lightning_Dragon_
    @Lightning_Dragon_ Před rokem +9

    Here's a tip from a fellow student to another, there is a good way to remember Oxidation = anode and Reduction = cathode. Using the phrase "an ox cared" You can know an=anode ox=oxidation and cared = ca and red which both respectively means cathode and reduction

    • @mosespumpuni2631
      @mosespumpuni2631 Před 11 měsíci

      Some books' got anode as positive and cathode as negative... it's so confusing 😕

    • @Lightning_Dragon_
      @Lightning_Dragon_ Před 10 měsíci

      @@mosespumpuni2631I think you might be getting it confused. Theres also a thing where electrons (negative charge) flow to cathode and positive charge flow to anode, which makes sense because anode is negative which attracts positive and vice versa. But the charge of the anode itself is always negative and cathode positive. Hope this helps.

    • @rjhick1
      @rjhick1 Před 9 měsíci

      @@mosespumpuni2631 That depends on the cell. Galvanic Cells Anodes are negatiive and positive cathodes. For electrolytic cells is flipped. The anodes are positive and cathodes are negatives.
      Still regardless dont pay attention to that. Oxidation happens at anodes, and reduction happens at cathodes regardless of its the cell is galvanic or electrolytic. Thats the part to remember

    • @rjhick1
      @rjhick1 Před 9 měsíci

      Thats good. Another good one is Red Cat. Reduction happens at cathode.

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    @sgregory0753 Před 2 lety +7

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  • @JayJay-ki4mi
    @JayJay-ki4mi Před 3 dny

    Here because I'm building earth batteries. Needed to recap on stuff I learned and forgot 20 years ago. The salt bridge isn't required in an earth battery because the soil does the same job :) Thank you.

  • @intuitivecontrolsystem4436
    @intuitivecontrolsystem4436 Před 3 lety +148

    Why nobody discusses the salt bridge in detail.

    • @gcinabantungozi8723
      @gcinabantungozi8723 Před 11 měsíci +7

      Dwift did

    • @linddddd
      @linddddd Před 9 měsíci +11

      It’s used to prevent the mixing of the half reactions and balancing them out :)

    • @the_crackin3610
      @the_crackin3610 Před 8 měsíci +4

      To retain charge balance

    • @mattheq9930
      @mattheq9930 Před 7 měsíci +5

      @@lindddddactually its to retain the electron flow of the voltaic cell

    • @AlexIsPsychotic
      @AlexIsPsychotic Před 5 měsíci

      ​@@mattheq9930that's the same thing

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    @aroraptor7550 Před rokem +1

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    @RogerRumbu Před 6 měsíci +1

    Well presented - Thank you

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    @egbujorandrew Před rokem +1

    Thanks for this
    It helped a lot 👍

  • @GotYourWallet
    @GotYourWallet Před 2 lety +6

    Do the electrons travel only through the wire or will a small amount travel through the salt bridge?
    Edit: I just found the answer on stack exchange. A small amount of current will leak through the electrolyte. To counter this modern batteries have a membrane called a separator that allows ion exchange but has a much higher resistance to combat the flow of electrons.

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    @shahlalkhan1916 Před rokem

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    Sir please explain cathodic , ICC protection of Marine ships to protect submesed part of the ships like Hull, Rudder, propeller, shaft ofthe main propelling engine,

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  • @NoName-kt4ws
    @NoName-kt4ws Před rokem +2

    to remeamber it just use "AN-OX" and "CA-R"

  • @michael42158
    @michael42158 Před 2 lety +1

    It is the ions from the salt bridge which flow into the two 1/2 cells to maintain electroneutrality.

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  • @laura79613
    @laura79613 Před 4 lety +11

    Concerning the salt bridge, if the zinc ions flow to the cathode side, will the copper electrode now get coated by zinc metal?

    • @jaceduhon3118
      @jaceduhon3118 Před 3 lety +7

      No. The zinc ions will combine with the sulfate ions from the copper side and form a salt

  • @Keato20
    @Keato20 Před 2 lety +3

    I just have one question. Hypothetically, if we had a Mg and Zn simple cell (one beaker) in a dilute acid, would the electrons on Mg go to Zinc or would the Mg react and reduce the H+ ions in the acid instead. I am presuming Mg would directly reduce H+ because Zinc is more reactive than Hydrogen. Also there is a bigger difference in reactivity between H+ and Mg too. ???????

  • @aliahmad32551
    @aliahmad32551 Před měsícem +1

    Thank youuuuuuuuuuu!

  • @kelvin1518
    @kelvin1518 Před 4 lety

    hello,is this how the lead acid battery terminals named or does it mean ,cathode is the positive terminal of a lead acid battery and the anode is the negative terminal? or does it mean anode is the positive terminal of the battery and the cathode is the negative terminal of the battery?

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    @lorokenyi8688 Před 3 lety

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    @user-ou5vd7wr6c Před 10 dny

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    @user-me2qd4bl3f Před rokem

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    @legendvanderwaal3608 Před 10 měsíci +1

    This man be good❤💥😎

  • @arialshaine7043
    @arialshaine7043 Před 2 lety

    Thank you so much

  • @WastedElephant
    @WastedElephant Před 2 lety

    So how do you build the salt bridge? And how do you stop the electrons from flowing through it instead of through your load?

  • @LowkeyySaad
    @LowkeyySaad Před rokem +1

    Thanks sir ❗️♥️

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    @AokijiKuzan8 Před rokem

    Finally getting the hang of this topic 😸😂 thanks to JG

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    @marthadiabla2062 Před 3 lety

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    @userr_aa Před 3 lety +7

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    Thank you 😊

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    @eddiek8950 Před rokem

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    @raymondyang3097 Před 4 lety

    you are legit better than my teacher

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    @docterayihendo296 Před 3 lety

    Very fine

  • @itzshortclipz8016
    @itzshortclipz8016 Před 4 lety +13

    excuse me i’d like to make a correction at 9:13
    aren’t cations positively charged ions? think, ca+ion (plus for positive).

    • @blomblorpf
      @blomblorpf Před 4 lety +10

      He did say it wrong, but then a few seconds later correctly again.

  • @spandansenapatib2265
    @spandansenapatib2265 Před 2 lety

    Nice video

  • @vfxentity
    @vfxentity Před 2 lety

    Thank you sir

  • @arpitkumarsahoo4172
    @arpitkumarsahoo4172 Před rokem

    I dont get the electric potential part 10:50 . If the zn soln has a potential 0.76 and cu soln has a potential of 0.34, then shouldn't the potential difference be the total voltage rather than adding it ?
    The vid made everything very clear. thanks for that

  • @mariakime1943
    @mariakime1943 Před 3 lety

    How do we know to add the sulfate when it is not in the reaction?

  • @arif_inspiron
    @arif_inspiron Před rokem

    can we take any other metal aq. solution instead of Zn(SO)4 solution in the 1st pot?

  • @Eilshad-fv1xu
    @Eilshad-fv1xu Před rokem

    Thanks sir

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    @saviole9370 Před 4 lety +2

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