i think propylamine is the only possible answer because IUPAC have that system of only saying amino, when there are other functional groups present, and yh conc h2so4 is fine,

Reply 1384

paul272

where do u guyz think full ums will lie

Reply 1385

paul272

i knw ive dropped like 10 marks tho at least

Reply 1386

paul272

so u see for the mechanisms to do with ammonia and propanoyl chloride, did we have to show another nh3 reacting with the lost hydrogen, coz in previous markshemes thats always in brackets

Reply 1387

Vinz93

Original post by paul272

so u see for the mechanisms to do with ammonia and propanoyl chloride, did we have to show another nh3 reacting with the lost hydrogen, coz in previous markshemes thats always in brackets

dont think so. 1 mark for mechanism name. 1 mark for product name. 4 marks remaining...i doubt it

Reply 1388

desijut

Original post by paul272

so u see for the mechanisms to do with ammonia and propanoyl chloride, did we have to show another nh3 reacting with the lost hydrogen, coz in previous markshemes thats always in brackets

dont think so, i did just in case but it would be harsh of them to change it just this one time

Original post by paul272

where do u guyz think full ums will lie

http://web.aqa.org.uk/UMS/index.php

You can convert marks to UMS using that, so you can check jan 10, june 10, jan 11 and june 11 and try to see where it will most likely lie. It's down at the moment, otherwise i would have done it

Reply 1389

Fluffy Chuckie

Is detonation of TNT in the specification? I checked the specification and I could only find the manufacturing of explosives or is that what they mean?

Reply 1390

Vinz93

Original post by Fluffy Chuckie

Is detonation of TNT in the specification? I checked the specification and I could only find the manufacturing of explosives or is that what they mean?

it was a maths question. Basically, it said you needed equal moles of C and CO and since they are the only carbon containing products you stick them with 3.5 and 3.5 each. and then follow trend with the other 2 products.

Reply 1391

handsome7654

Original post by paul272

i think propylamine is the only possible answer because IUPAC have that system of only saying amino, when there are other functional groups present, and yh conc h2so4 is fine,

what if you put h2so4 without the conc? :confused:

Reply 1392

FinallyAValidName

Original post by Competencies

That's a 10 mark swing over previous years, no way that happens.

Boundaries aren't going to vary by an awful lot, maybe 5 at the most.

what are your thoughts on this ^?
:colone:

Reply 1393

Bubbles94

Original post by gori_kuthi

i agree, for the elimination mechanism, the reagent was tetramethylsilane

what are you talking about no it wasnt! Si(CH3)4 is a standard in nmr.... the reagent is concentrated phosphoric acid.

Reply 1394

Master.K

Original post by Vinz93

it said to deduce the structure so perhaps a name or a structural formula may suffice. Drawing it should definitely get you the marks though.

I drew the structures, but was wondering you know for propan-2-ol, was I suppose to actually draw the O-H bond for the OH group on the second carbon?

Reply 1395

Vinz93

Original post by Master.K

I drew the structures, but was wondering you know for propan-2-ol, was I suppose to actually draw the O-H bond for the OH group on the second carbon?

don't think so. OH as it is or O-H drawn out makes no difference. so long as it corresponded to propan-2-ol, you're fine.

Reply 1396

Bubbles94

if it said STRUCTURE you have to draw out the bond between the O-H.. i know it's unfair but you do.. in my last paper i lost so many marks because i just put OH..