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National 5 Chemistry

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Original post by ballsagitarius
what did you guys get for the ammonium citrate question. I said that it would decrease the ph of the soil and that nitrogen (in ammonia) is an essential element for plants to make amino acids.


Yeah that's what I said. It would neutralise it or something. Something to do with the pH
Original post by Ethan100
I said CnH2n+2O

Edit : The 2 before the O is for the Hydrogen, Its basically like the Alkane general formula


I wrote CnH2n O. since all of them had 1 oxygen(functional group maybe)
Original post by ballsagitarius
I wrote CnH2n O. since all of them had 1 oxygen(functional group maybe)


Yeah but doesn't the Hydrogen add 2 when multiplied by 2 ?
Original post by ballsagitarius
I wrote CnH2n O. since all of them had 1 oxygen(functional group maybe)


I wrote the same only that I added 2 on to the hydrogen
I put Cn 2n+2 O


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Sorry I mean CnH2n+2O


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Would I get the mark for CnH2n+O2 ?
Original post by Lewis H01
Would I get the mark for CnH2n+O2 ?


Not sure :/


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Original post by Rebeccahughes15
Sorry I mean CnH2n+2O


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I got the same as you!
Original post by Lewis H01
Would I get the mark for CnH2n+O2 ?


Not sure, most of these questions are just 1 markers so I'm guessing if its not totally correct you won't get it. Maybe it was 2 marks though.
Original post by A+Hunter
I got the same as you!


Why is it 2O ?

I REALLY WANT TO SEE A PAPER 2
haha
For the fuel cell question here's what I got:

i)oxidation,

ii ) Redox reaction = Br2 + SO3 +H20 = 2Br + SO4 + 2H
Something like that ^
Original post by Ethan100
Why is it 2O ?

I REALLY WANT TO SEE A PAPER 2
haha


CnH2n+2O

Dunno mate just took a wild guess
Original post by A+Hunter
For the fuel cell question here's what I got:

i)oxidation,

ii ) Redox reaction = Br2 + SO3 +H20 = 2Br + SO4 + 2H
Something like that ^


You didn't need to do much for the redox because it was already 2e- right ?
Original post by Ethan100
You didn't need to do much for the redox because it was already 2e- right ?


Yep.

Electrons cancelled out
For the MP 20 did anyone choose lithium ions, since the water turning cloudy suggests a reaction occured. The only element which can displace potassium carbonate is lithium.
Original post by Ethan100
You didn't need to do much for the redox because it was already 2e- right ?


Yeah, you just cancel them out...

Does anyone know what they put for the balancing the equation ?
did you any of you get a headache trying to answer the balancing question. Had to come back to it at the end and got 3 on the left side and a 3 on the right. I can't remember on which compounds tho
Original post by Abbyy1234
I posted them on like the 2nd or 3rd page of the chat

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Are they your answers or the actual answers ?
Original post by A+Hunter
For the fuel cell question here's what I got:

i)oxidation,

ii ) Redox reaction = Br2 + SO3 +H20 = 2Br + SO4 + 2H
Something like that ^


I was worried about not be able to fit it all into one line.

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