Hello Dr Hanaa, I have a question regarding Q18d(ii) - I thought the V3+ ion is going to be oxidised to +4 only and found out the equation cannot be balanced out neatly until I use the equation as stated in the video. Where can we tell the V3+ ions could be oxidised directly to the oxidation state of +5? Is it a fact that I just have to memorise or it is deduced from balancing the equation?
Because 2Mno4 is reducing to Mn+2 and with overall equation u can see its total 10 electrons gained so total vanadium will lose 10 electrons and there are 5 V so each will lose 2 so oxidized from 3 to 5
look up the hydrogen oxygen fuel cell equations in anode and cathode. they’re different in alkaline and acidic electrolyte. the equations she got are basically the equations in alkaline solution but instead of hydrogen and oxygen they use zinc and manganese. also Ecell values never change even if you flip the equation
you are an absolute life saver
Great video dr. Thanks!
You are the only person who saves me miss, thank you very much🤗😘
thank you soo much mam almost lost my hope this video just build my confidence again
Thank you very much for uploading this video this will help me so much🙏🙏🙏🙏🙏
Is it please possible to post topic wise video of unit 5 ? Pls I really need your help.
She won't, she does this only
No she does content videos too
Thank you very much for posting these Miss , could please do unit 4 jan23?
very helpful. could u pls also post jan 2019 unit 5 paper
could you please post older unit 5 papers please, my exam is in 3 days
how did u figure out the equation at 36:50?
Use data booklet to get their respective equations, and then using the 2 : 5 ratio from part a, multiple each equation by their respective ratio
@@rokeebakomolafe7148 thank you!
Hello Dr Hanaa, I have a question regarding Q18d(ii) - I thought the V3+ ion is going to be oxidised to +4 only and found out the equation cannot be balanced out neatly until I use the equation as stated in the video. Where can we tell the V3+ ions could be oxidised directly to the oxidation state of +5? Is it a fact that I just have to memorise or it is deduced from balancing the equation?
Same question 😢
Because 2Mno4 is reducing to Mn+2 and with overall equation u can see its total 10 electrons gained so total vanadium will lose 10 electrons and there are 5 V so each will lose 2 so oxidized from 3 to 5
could you do May, Oct 23 too? exams are like a day after
Please upload a video on may 23 unit 5
1:01:21 can sb explain how she got those equations? And why -1.28 didnt become +1.28 when shifted to the other side?
look up the hydrogen oxygen fuel cell equations in anode and cathode. they’re different in alkaline and acidic electrolyte. the equations she got are basically the equations in alkaline solution but instead of hydrogen and oxygen they use zinc and manganese. also Ecell values never change even if you flip the equation
can you please upload may23 and oct 23 u5
It will be really helpfulll
Miss plz do unit 6 and unit 4 too
Unit 6 th-cam.com/video/OdRThD1B9E0/w-d-xo.html
@@drhanaaassil-chemistryteac9433 thank u very much
Miss plz do unit 4
a great help
Jan 24 u5 pls!
nice now try solving the paper without access to the mark scheme bc all u do is copy and paste points from the mark scheme and read it out
Ikrr, she could explain a lil bit more
There is a video in your ads