AQA CHEM2 ~ May 23rd 2012 ~ AS Chemistry

Reply 1380

berryripple

Can feel a sick feeling of panic rising in my throat... ew

Reply 1381

Mocking_bird

11

Original post by Angry cucumber

x

I can't reply to you on your profile/inbox!
I don't know if i'm just being blind but I really can't see a way too :lol:

Anyway, i'm glad you liked it. I havent updated it in a while as I just kept forgetting and there isn't really much use now since the exam is tomorrow.
I'm going to keep more up to date with it in A2 though I think as it was quite helpful :biggrin:

Reply 1382

MathMad

Original post by idunnotbh

which reactions do we have to know specific conditions for? (like specific temp) and so we cant just say high temp and what are the conditions?

Maybe the hydration of ethene, you've got to know that it takes place at 300 degrees, 60-70 atmospheres.

Methanol production from hydrogen and carbon monoxide;
Pressure: 50-100 atmospheres,
250 degrees.

Reduction of iron oxide (blast furnace-700 degrees)
Reduction of manganese (IV) oxide- 1200 degrees.
Chloride being reduced in a furnace at 1000 degrees in the extraction of Titanium.

Enzyme in yeast works at around 30-40 degrees, optimum temp (any higher-enzyme will be denatured)

Reply 1383

Tealeaves

Original post by kiiran

same tbh, rather get my sleep :tongue:

kinda given up as its my last exam 2moro. But, yes I think i will do an all nighter

that's great :smile:

lets message each other when we have a problem :]

Reply 1384

darkred

20

Original post by Mocking_bird

One of the most cringeworthy episodes! (Besides the disco one anyway..!)

Just get up early in the morning and go over it then instead, at least thats the way I prefer :tongue:

Yeah I'll probably do that, especially since this is an afternoon exam.

Oh come on, the ballsack one was... far worse. Watched it with my dad. :lolwut:

Reply 1385

Mocking_bird

11

Original post by failingatm

Yeah I'll probably do that, especially since this is an afternoon exam.

Oh come on, the ballsack one was... far worse. Watched it with my dad. :lolwut:

I forgot about that one.... thanks for reminding me :slap:

Reply 1386

username890104

2

Original post by failingatm

I nearly always stay up before exams, because I'm so scared I'll forget everything while I sleep. :afraid:

You're probably better off getting a good nights sleep unless you've done absolutely no revision prior to the night before the exam, in which case I would advise one major cramming session.

Reply 1387

idunnotbh

Original post by MathMad

Maybe the hydration of ethene, you've got to know that it takes place at 300 degrees, 60-70 atmospheres.

Methanol production from hydrogen and carbon monoxide;
Pressure: 50-100 atmospheres,
250 degrees.

Reduction of iron oxide (blast furnace-700 degrees)
Reduction of manganese (IV) oxide- 1200 degrees.
Chloride being reduced in a furnace at 1000 degrees in the extraction of Titanium.

Enzyme in yeast works at around 30-40 degrees, optimum temp (any higher-enzyme will be denatured)

thanks a lot

Reply 1388

darkred

20

Original post by Mocking_bird

I forgot about that one.... thanks for reminding me :slap:

Hope you think of ball sacks during the exam tomorrow! :bigsmile:

jkjkjkkkkkk

Good luck :h:

Original post by Tullia

You're probably better off getting a good nights sleep unless you've done absolutely no revision prior to the night before the exam, in which case I would advise one major cramming session.

Of course I've revised :innocent:

Yeah you're right. Going to bed at 10 :smug:

good luck for tomorrow :smile:

Reply 1389

muahhaha

Original post by muahhaha

Anybody know if the question asks to outline mechanism, I should draw display formula or structural formula?
Plus, If they just ask draw the structure of something, can I just draw display formula because I found it easier than structural :frown:

Anyone can help me please I'm really confused :frown:

(

Reply 1390

Mocking_bird

11

Original post by failingatm

Hope you think of ball sacks during the exam tomorrow! :bigsmile:

jkjkjkkkkkk

Good luck :h:

Of course I've revised :innocent:

Yeah you're right. Going to bed at 10 :smug:

good luck for tomorrow :smile:

Good luck to you too :cute:

Reply 1391

username890104

2

Original post by failingatm

Of course I've revised :innocent:

Yeah you're right. Going to bed at 10 :smug:

good luck for tomorrow :smile:

Good luck to you too. :smile:

Oh, and you as well, M_B. :tongue:

Reply 1392

posting

any1 with a mark scheme for jan 12 unit 2 paper? Would be much appreciated thanks

Reply 1393

shuaib786

2

You know when it says state the conditions for an elimination reaction or nucleophilic substitution reaction is it to state:

Elimination:
Hot and ethanolic conditions or high temperature and ethanol as solvent???

Nucleophilic Substitution:
Warm and aqueous conditions or low temperature and water as solvent???

Reply 1394

hus11128386

Original post by muahhaha

Anyone can help me please I'm really confused :frown:

(

my teacher advised us to use displayed

Reply 1395

hus11128386

Original post by posting

any1 with a mark scheme for jan 12 unit 2 paper? Would be much appreciated thanks

here it is..

AQA-CHEM2-W-MS-Jan12.pdf293.6KB

Reply 1396

darkred

20

Original post by shuaib786

You know when it says state the conditions for an elimination reaction or nucleophilic substitution reaction is it to state:

Elimination:
Hot and ethanolic conditions or high temperature and ethanol as solvent???

Nucleophilic Substitution:
Warm and aqueous conditions or low temperature and water as solvent???