AQA - Unit 5 - Energetics, Redox and Inorganic Chemistry

Original post by Arab_Empress

Does anyone kno what the titration curve for ethanedioate ions with manganate ions look like,??

it was in jan 10 paper

ANYONE? :smile:

it's not a titration curve is it? it's asking for the conc of manganate ions not pH...

Reply 1124

angel1992

shud i do an all nighter or not??? dont know???

Reply 1125

Original post by NRican

Quickly look over one side by side with a mark scheme in 20 mins or less then sleep.

just done this with jan10... now gonna read through june10 and june11 then try and be asleep by 1:30 so I can get 6.5 hours-ish sleep... I need like a million ums in this since unit4 was soo hard :frown:

Reply 1126

Original post by Seher

they're from legacy/old spec papers from the relevant topics...

The old papers tend to be harder, so I guess youve done the harder questions, we had to do some for homework...I guess its upto you, it all depends on how confident you are...If you are confident then just sleep
If you are really worried and a paper will help you relieve that worry than do that..... :smile:

Reply 1127

Original post by angel1992

shud i do an all nighter or not??? dont know???

I'd say go to sleep. Get at least 6 hours of sleep or silly errors will start adding up (this always happens to me but you might be able to deal with lack of sleep better than me)

Reply 1128

Jin3011

21

Damn I really need to go to sleep too. Feel so underprepared though =[

Reply 1129

angel1992

Original post by Seher

I'd say go to sleep. Get at least 6 hours of sleep or silly errors will start adding up (this always happens to me but you might be able to deal with lack of sleep better than me)

i think i will have 2 hours, still need to mek sure i know titration sections and bit about fuel cells really, plus the monotous stuff like advanatges disadvantages hopefully wont tek tto long

Reply 1130

Original post by Seher

it's not a titration curve is it? it's asking for the conc of manganate ions not pH...

Oh yeh ure right lol

With no relevance to this quesiton wat so ever,

Does the the 2nd curve down on the left look like the curve for this question

Reply 1131

teddyWS

hey guys, you know when a titration Q asks you to work out a certain % of something.. in the mark scheme they subtract moles but would you get the marks for doing it in %s? e.g
find the % of fe2+ that's been oxidised.
couldn't you do say... 70% of fe2+ present so 100%-70%= 30% oxidised?

n_n

Reply 1132

Original post by Arab_Empress

The old papers tend to be harder, so I guess youve done the harder questions, we had to do some for homework...I guess its upto you, it all depends on how confident you are...If you are confident then just sleep
If you are really worried and a paper will help you relieve that worry than do that..... :smile:

yeah some of the chapter 4&5 stuff is definitely much harder but the new papers have loads of tricky questions that skate around the topics without ever getting to the point whereas the older papers are mostly regurgitation. I guess I'm just worried they'll take a leaf out of biology's book and ask a load of unrelated Qs that might throw me off =/

Also it's freaking me out that like just 1 mark in this exam alone could stop me going to uni... I definitely need to stop thinking lol

Reply 1133

Original post by Seher

yeah some of the chapter 4&5 stuff is definitely much harder but the new papers have loads of tricky questions that skate around the topics without ever getting to the point whereas the older papers are mostly regurgitation. I guess I'm just worried they'll take a leaf out of biology's book and ask a load of unrelated Qs that might throw me off =/

Also it's freaking me out that like just 1 mark in this exam alone could stop me going to uni... I definitely need to stop thinking lol

Lol yeah tru say, jus do ure best and be confident

Good Luck

Reply 1134

Original post by Arab_Empress

Oh yeh ure right lol

With no relevance to this quesiton wat so ever,

Does the the 2nd curve down on the left look like the curve for this question

haha that scared me for a sec, I was trying to figure out what pH MnO4- ions would be...

yeah I think so... it basically starts slow, increases rapidly and then levels off.

Reply 1135

Original post by Jin3011

Damn I really need to go to sleep too. Feel so underprepared though =[

Ive learnt how to deal with 3 hours of sleep lol

If I get at least 3 hours Il be happy

Reply 1136

Original post by Arab_Empress

Lol yeah tru say, jus do ure best and be confident

Good Luck

I'll try and calm down lol thanks :smile:

good luck to you too :smile:

is this your last exam as well?

Reply 1137

Original post by Seher

I'll try and calm down lol thanks :smile:

good luck to you too :smile:

is this your last exam as well?

Yes and Thank God for that, I will honesly sleep for as long as I can, and do nothing for a long time,,,literally :biggrin:

Reply 1138