Thoughts on Chemistry CSSA paper (3 Viewers)

[schmani]

Couple of weeks..?

 

[danno1990]

I thought the questions were very content based and not to skillsy. But my chem teacher is a HSC marker so all my answers are scrutinized and thus God knows what mark ill get, something low.

 

[Undermyskin]

Exactly! But aren't CSSA trials harder than real HSC? Hope that'd be true so I don't feel like a big failure with a crap CSSA mark.

 

[liamh16]

our teachers will mark them pretty quick.
our core is already marked.
just depends on how long it takes the other teacher to mark shipwrecks.

 

[danno1990]

our teachers will mark them pretty quick.
our core is already marked.
just depends on how long it takes the other teacher to mark shipwrecks.

Has miss already marked the core???

 

[dumarab]

i put ethanoic, that was the only one i recognised, and its naturally occuring, so i think its right.

Twas citric.... it occurs naturally in lemmon and ethanoic is monoprotic...Citric is triprotic

 

[Wassup?]

Twas citric.... it occurs naturally in lemmon and ethanoic is monoprotic...Citric is triprotic

AHHHH! An Arab doing CHEMISTRY! Keep him away from all the chemicals! He'll blow the lot of us up!! AHHHHHHHHHHHHH

 

[Pwnage101]

2-hydroxypropane-1,2,3-tricarboxilic acid should be the answer, commonly known as citric acid, or C6H8O7 - it is triprotic as it can donate the hydrogen on EACH of its carboxilic acid functional groups (of which it has 3), as well as the fact that it is a weak acid and only aprtially oinises (2nd and 3rd acid dissociation constants are very small - in the order of 10^-7)

 

[Undermyskin]

How do you diagrammatically show iodine dissolved in ethanol? (2 marks)

 

[Pwnage101]

draw their structures, show they are both non polar (ethanol has one end non polar), write they will interact via dispersion forces and thus will dissolve
i rekon 1 mark = proper lewis/electron diagrams or full srtuctural formula
the 2nd mark for an INDICATION (visually or written) that they both dissolve due to non-polar nature, ie dispersion forces

 

[hon1hon2hon3]

I did the CSSA paper for chem as well, but i dont remember they asked me to draw a picture explaining how iodine dissolve in ethanol , but instead its like a short answer questions ? . . . dont tell me i didnt read the question correctly please

 

[m.incognito]

AHHHH! An Arab doing CHEMISTRY! Keep him away from all the chemicals! He'll blow the lot of us up!! AHHHHHHHHHHHHH

HAHAHAHAHAHAHAHA. Horrible. Just the type of joke I'd make.

Hahahaha with the thing we had to systematically name... I forgot it was 'tetra' so just wrote "quad"... LOL.

 

[SpoonSamba]

Hahahaha with the thing we had to systematically name... I forgot it was 'tetra' so just wrote "quad"... LOL.

hahah SAME! i was like di, tri, ... , pent WTF IS FOUR i'll just put quad

and that diagram thing like WTF i just drew a beaker and some letters and circles in it lol oh god i failed so bad.

 

[liamh16]

dan, yeah, she has. she was finishing up marking them in bio period 4 on friday.
when do you reckon sherrah will finish shipwrecks?

 

[ezzy03]

OMG im with wixxy ... had NO IDEA!

if i get 50% i will be over the moon

srsly my teacher if the biggest dud u ever know so we had no hope in the first place

 

[tau281290]

my chem trial is next week...are we doing the same exam??

 

[Triple777ER]

my chem trial is next week...are we doing the same exam??

Obviously not. The catholic paper is done by schools who have elected to at the same day, same time.

Your's is either NEAP, or if it may have already done by other schools, you might be doing school-based trial exam.

 

[Undermyskin]

draw their structures, show they are both non polar (ethanol has one end non polar), write they will interact via dispersion forces and thus will dissolve
i rekon 1 mark = proper lewis/electron diagrams or full srtuctural formula
the 2nd mark for an INDICATION (visually or written) that they both dissolve due to non-polar nature, ie dispersion forces

Thank god. But if I'm not getting those 2 marks that's the end of your days! Kidding.

 

[NorthRiversMatt]

Wasn't hard one. Felt alot better than past exams. I think i say at least 50-60's.

 

[wixxy2348]

Exactly! But aren't CSSA trials harder than real HSC? Hope that'd be true so I don't feel like a big failure with a crap CSSA mark.

well they say independent exams are a good indication of HSC
my teacher says independent exam = SHIIIT hard this year
so she decided to have us sit cssa instead so we can 'work up to that level'
which means now i'm shitting myself about actual hsc.