you are such a help to people like us in Africa where we currently don't have a chemistry teacher really appreciate your work and will also recommend your channel to all of my mates
Thank you so much for this playlist! My A2 exams begin in a few days and I was so blank while trying to do the past paper questions but the topic is much clearer now. This is so much better than reading the chapter. Thanks a lot and keep up the great work! :)
+Nikita Verma Thanks! Hope your exams go well. Yes these videos are designed to support text books and I made them as an additional, different source of information. I am pleased they are helping! Please spread the word!
Isnt the fuel cell you talked about in acidic conditions so electrolyte is something like H3Po4? In alkaline fuel cells At negative electrode H2+2OH- -->2H20 +2e
why are you saying that the negatively charged part is the cathode and the positively charged one is that anode isn't it supposed to be the other way around ? or were you talking about the electric current ?
Awesome video, really helpful in understanding the different cells. Just for reassurance, when REACHARGING, an external voltage applied forces the reaction backwards and when this happens you swap the equations around, however, do the EMF values switch around and does the ANODE and CATHODE switch around too? Thanks
you have said that in case of half equations we should first write both the equation in the reduced form...but in case of rechargeable lead-acid battery u didnt write both the equation in reduced form and put the values as they are...can u please explain me this?#allerychemistry
Hi sir is this still relevant for the current ocr spec? I’ve been looking for updated fuel cell videos everywhere and it’s such a small topic but I just wanted to make sure I know everything I need to for the exams!
This will sound soo dumb but in the non-rechargeable battery, when the zinc anode is oxidised, then does it reduce in size because the zinc metal is losing electrons and forming ions? Batteries never reduce in size though so I was just confused about that. Thanks so much if you reply :)
+Mel tansz No it's a very good question! You are right the casing will wear away. Normally there is a thin protective plate between outer plastic label and zinc electrode to prevent the battery shape distorting. Occasionally though even this is damaged and the battery leaks. Very messy!
I'm confused, so in lead Acid battery, the anode is reduction, and the cathode is oxidation but in Zinc-Carbon Battery, the Anode is oxidation, and cathode is Reduction??
+thesuperproify Yes an odd one. You just have to remember that exception I'm afraid! The reasons behind this are complex and exceed A level specifications.
+Arash Outadi The Cathode is negatively charged and the H+ ion is attracted towards the opposite charge. While at the negative charge it gains electrons and is reduced.
you are such a help to people like us in Africa where we currently don't have a chemistry teacher really appreciate your work and will also recommend your channel to all of my mates
Thank you so much for this playlist! My A2 exams begin in a few days and I was so blank while trying to do the past paper questions but the topic is much clearer now. This is so much better than reading the chapter. Thanks a lot and keep up the great work! :)
+Nikita Verma Thanks! Hope your exams go well. Yes these videos are designed to support text books and I made them as an additional, different source of information. I am pleased they are helping! Please spread the word!
+A Level Chemistry Revision Videos by Allery Tutors Thank you :) Sure, I'll let my friends know. :)
Will be recommending your channel to others how did I not know about this last year you're a brilliant teacher
+Uks bridge Thanks very much! Thanks for spreading the word! The more people that use these vids the better!
you and freesciencelessons are saving my exams rn
Absolutely stunning work!
Thanks very much!
Isnt the fuel cell you talked about in acidic conditions so electrolyte is something like H3Po4?
In alkaline fuel cells
At negative electrode
H2+2OH- -->2H20 +2e
why are you saying that the negatively charged part is the cathode and the positively charged one is that anode isn't it supposed to be the other way around ? or were you talking about the electric current ?
Awesome video, really helpful in understanding the different cells. Just for reassurance, when REACHARGING, an external voltage applied forces the reaction backwards and when this happens you swap the equations around, however, do the EMF values switch around and does the ANODE and CATHODE switch around too? Thanks
Thanks! Yes you are right. :-)
Awesome! Thank you
you have said that in case of half equations we should first write both the equation in the reduced form...but in case of rechargeable lead-acid battery u didnt write both the equation in reduced form and put the values as they are...can u please explain me this?#allerychemistry
Thank you so much, Very useful!!
you said on the last methanol fuel cell that only water is formed as a side product, what happens to the co2 that is made at the anode then ?
Hi sir is this still relevant for the current ocr spec? I’ve been looking for updated fuel cell videos everywhere and it’s such a small topic but I just wanted to make sure I know everything I need to for the exams!
Yes it is, the current spec has been around for a while now - since 2015!
@@AlleryChemistry thank you Sir
Great vid, have you done any on Benzene chemistry and the rest of A2 organic chemistry?
Hi Chris,
How do you have a higher Hydrogen density in Methanol that in Hydrogen gas itself?
Thanks
Id say because methanol has more hydrogen atoms than hydrogen gas, since hydrogen gas is only 2 Hydrogen atoms. Double check though!
This will sound soo dumb but in the non-rechargeable battery, when the zinc anode is oxidised, then does it reduce in size because the zinc metal is losing electrons and forming ions? Batteries never reduce in size though so I was just confused about that. Thanks so much if you reply :)
+Mel tansz No it's a very good question! You are right the casing will wear away. Normally there is a thin protective plate between outer plastic label and zinc electrode to prevent the battery shape distorting. Occasionally though even this is damaged and the battery leaks. Very messy!
That makes so much more sense! Thanks so much for the reply it cleared up my doubts! :)
+Mel tansz No problem!
In lead acid battery ,lead is the anode which undergoes oxidation and lead oxide is the cathode which undergoes reduction
Hi Sir, do we need to learn these equations by heart or will they be given in the exam?
Thank you for helping and spreading your knowledge of chemistry, Its really appreciated
sir can you cancel out the 2e- if theyre on the same side AND the opposite side of the half equation?
Thanks so much, i always click on your videos if i need help with understanding.
I'm confused, so in lead Acid battery, the anode is reduction, and the cathode is oxidation
but in Zinc-Carbon Battery, the Anode is oxidation, and cathode is Reduction??
+thesuperproify Yes an odd one. You just have to remember that exception I'm afraid! The reasons behind this are complex and exceed A level specifications.
A Level Chemistry Revision Videos by Allery Tutors alright, thanks a lot mr Allery :D:D:D:D
14:01 anode is positively charge??? Isn'tit negative?
Cool
very helpful !
thankyou very much Allery tutor
+Shakeel Ahmed No problem. Please spread the word!
Allery Chemistry go
when you talk about chemistry, you're so cute;)
thanks
Boy what the hell boy 👦
Why does the H+ want to move toward the cathode?
+Arash Outadi The Cathode is negatively charged and the H+ ion is attracted towards the opposite charge. While at the negative charge it gains electrons and is reduced.
+Allery Chemistry okay what is the cathode negatively charged with? Is the oxygen gas also reacting with platinum to make oxide ions?
It is negatively charged due to a larger number of electrons than protons.
Indian ?
h