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Reply 300
I don't understand the MS answer to 3gii in January 2011.
Original post by krisshP
One question

What really is oxidation?

It means loss of electrons in Redox. But what does it actually mean in organic chemistry, like saying alcohol oxidises to aldehyde then oxidises to carboxylic acid?


I think it still means the loss of electrons however it also converts from aldehyde to carboxylic acid in a reflux :s-smilie:

Aldehyde is rcoh
Carboxylic acid is rcooh so there is a loss of electrons

Also for the Advance notice, is there a predicted questions thread- because i need more questions

Thanks in advance
(edited 10 years ago)
Reply 302
Original post by krisshP
I don't understand the MS answer to 3gii in January 2011.


I think it has something to do with chlorine being a halogen, making it quite expensive compared to HCl. It is also highly reactive so would need specialised equipment to handle it.
Reply 303
Just to clarify from % to ppbv you x 10,000,000 and divide for vice versa? Thanks.

Oh and could someone explain this wet and dry deposition stuff it's confusing me :frown:

Posted from TSR Mobile
Where is the origin of NOx emissions?
Do they mean how NOx is produced by internal combustion, under high pressure the N react with O?
Original post by Whostolemycookie
Where is the origin of NOx emissions?
Do they mean how NOx is produced by internal combustion, under high pressure the N react with O?


Yes that's it tbh. You can also mention the burning of traditional fossil fuels, which can release oxides of nitrogen, etc. General knowledge of pollutants from unit 1 :smile:
Reply 306
There is past paper questions on green chemistry. There's been questions about atom economy, percentage yield, building a new plant before which are all in green chemistry
Reply 307
Original post by Whostolemycookie
I think it still means the loss of electrons however it also converts from aldehyde to carboxylic acid in a reflux :s-smilie:

Aldehyde is rcoh
Carboxylic acid is rcooh so there is a loss of electrons

Also for the Advance notice, is there a predicted questions thread- because i need more questions

Thanks in advance


Yes, somewhere in this thread
http://www.thestudentroom.co.uk/showthread.php?t=2294388
Original post by SherlockHolmes
Here are some notes made by the TSR user RebeccaTenney.


thanks man



Thx found it already :smile:
Original post by krisshP
Yeah, I know that. But still just say oxygen for exam purposes otherwise you may run out of time, besides the mark schemes allow it.


You have plenty of time in F332 papers :tongue:

But yeah, true.
Reply 311
Original post by usycool1
You have plenty of time in F332 papers :tongue:

But yeah, true.


Really?:biggrin::biggrin:

Thanks for the good news. I usually can't do one complete paper in timed conditions as they 1hr 45 mins too long for me.
Reply 312
I always manage to screw up the maths in chemistry. :frown:

Can someone please give me a list of equations I need to know for this exam?
I would be eternally grateful
Original post by tasniaa
I always manage to screw up the maths in chemistry. :frown:

Can someone please give me a list of equations I need to know for this exam?
I would be eternally grateful


I know what you mean, I suck at maths :s-smilie:
Original post by Whostolemycookie
I know what you mean, I suck at maths :s-smilie:


I always end up spending 10 minutes just staring at your sig :frown:
Reply 315
Original post by Whostolemycookie
I know what you mean, I suck at maths :s-smilie:


I'm okay with maths, but I can never remember the bloody equations like for volume and concentration and moles etc. :confused:
Reply 316
Original post by nukethemaly
I always end up spending 10 minutes just staring at your sig :frown:


Omg thank you for drawing that to my attention. He is so beautiful :love: Definitely brightened up chem revision!
I know he's just SO yummy :colondollar:
Reply 318
I know this would be a massive favour.. but could someone upload ALL the reaction conditions we need to know. I have a feeling Im missing some
Reply 319
Original post by tasniaa
I always manage to screw up the maths in chemistry. :frown:

Can someone please give me a list of equations I need to know for this exam?
I would be eternally grateful


Moles = Mass/Mr
Moles = Conc. x Volume (dm^3)
Moles = Volume (dm^3) / 24
Moles = No. of particles / Avogadro's constant

Edit:
E=hv
:smile:
(edited 10 years ago)