IB Chemistry Topic 9 Redox processes Topic 9.2 Electrochemical cells SL

IB Chemistry Topic 9 Redox processes Topic 9.2 Electrochemical cells SL
How to differentiate between galvanic and volatic cells. How draw the different cells and determine the products and voltage.

0:18 Comparing galvanic/volatic and electrolytic cells
1:26 Drawing a voltaic cell diagram
3:00 Predicting the products in a voltaic cell
3:41 Drawing an electrolytic cell diagram
5:21 Testing for conductivity
5:32 Predicting the products in an electrolytic cell

​9.2 Electrochemical cells SL
Voltaic (Galvanic) cells:
• Voltaic cells convert energy from spontaneous, exothermic chemical processes to electrical energy.
• Oxidation occurs at the anode (negative electrode) and reduction occurs at the cathode (positive electrode) in a voltaic cell.
Electrolytic cells:
• Electrolytic cells convert electrical energy to chemical energy, by bringing about non-spontaneous processes.
• Oxidation occurs at the anode (positive electrode) and reduction occurs at the cathode (negative electrode) in an electrolytic cell.
• Construction and annotation of both types of electrochemical cells.
• Explanation of how a redox reaction is used to produce electricity in a voltaic cell and how current is conducted in an electrolytic cell.
• Distinction between electron and ion flow in both electrochemical cells.
• Performance of laboratory experiments involving a typical voltaic cell using two metal/metal-ion half-cells.
• Deduction of the products of the electrolysis of a molten salt.

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[allisonstenz]

thank you ! now I have finally understood

[shadowsmar]

Hi Andrew, when you say the salt bridge "keeps the chemicals clean" what do you mean?

[aryanhampapur]

At 6:51 what is considered high in the reactivity series for paper 1

[matteobekink]

I’m quite confused, he said that the electrons move from the anode (-) to the cathode (+) for the voltaic cell, but for the electrolytic they move from the anode(+) to the cathode(-) . The charges are swapped around so it’s kinda confusing . Could someone explain why the charges of the electrodes don’t affect the flow of electrons ?

[setsunart]

so...anode is actually negative and cathode is positive
that's why our chemistry teacher told us:you don't need to know how to express in Chinese because it's really hard to differentiated these two and we could probably messed up lolol