**Chemistry...Before/After

FaoiSin

ei.sderob wrote: »

Anyone have the definition for a covalent bond and a sublevel? Grand for the rest on those links.

Covalent bond - Bond formed when two atoms share a pair of electrons

Sub level - Sub division of a main energy level and consists of one or more orbitals of the same energy

sdiff

Sorry if this has been asked but any predictions? I've revised everythong several times but want to go over important stuff again.

ei.sderob

YeaaahFaoiSin wrote: »

Covalent bond - Bond formed when two atoms share a pair of electrons

Sub level - Sub division of a main energy level and consists of one or more orbitals of the same energy

Coooool beans!

ivanh

Just under 17 hours!!!!!

I'm pumped. Boom.

HeaneyBabe

ivanh wrote: »

Just under 17 hours!!!!!

I'm pumped. Boom.

Me too!! What you hoping to get??

ei.sderob

Not too sure how to feel about this one lads....

leaveiton

Are there any resources online with summaries of the experiments? I just can't learn them from the book, it's a load of waffle.

paddyhes

ei.sderob wrote: »

Not too sure how to feel about this one lads....

Same.
Had to revise physics half of saturday and all yesterday.
Knew the entire chemistry course more or less before the exams started but when you go away from it it's so easy to forget half of it.
Strapped for time now to get everything revised and panicing (n).

earwax_man

paddyhes wrote: »

Same.
Had to revise physics half of saturday and all yesterday.
Knew the entire chemistry course more or less before the exams started but when you go away from it it's so easy to forget half of it.
Strapped for time now to get everything revised and panicing (n).

Same as me, I left chemistry for a while because of Irish, English and Maths. Although I have revised, I feel that I'm not as ready as I should be

ivanh

HeaneyBabe wrote: »

Me too!! What you hoping to get??

I reeeeally want an A1 - I have my biggest chance of getting one in Chemistry!

But I have a shi*t feeling the paper's gonna be.. well, shi*t

What about you?

paddyhes

earwax_man wrote: »

Same as me, I left chemistry for a while because of Irish, English and Maths. Although I have revised, I feel that I'm not as ready as I should be

I've been looking over experiments all evening.
Gonna try cover important theory, and maybe definitions, tomorrow.
Just don't know where to start.

Mista

leaveiton wrote: »

Are there any resources online with summaries of the experiments? I just can't learn them from the book, it's a load of waffle.

Not sure, but do exam questions on them, that way you'll only go over important stuff

ChemHickey

I don't feel good about this. Chemistry is my best (98% in mocks) and I didn't do anything really until now! I need this a1 and just hope what I remember from the mocks will stand for me.

Mista

ChemHickey wrote: »

I don't feel good about this. Chemistry is my best (98% in mocks) and I didn't do anything really until now! I need this a1 and just hope what I remember from the mocks will stand for me.

If you got that high, then a lot of the stuff is engraved onto your brain :P You'll find yourself remembering things you completely forgot about.. hopefully :P

FaoiSin

Need an A1. Gone over everything a few times but I get a weird feeling about it. There's no real definitive resource to learn the experiments so I just did the exam papers. Also, I hate the way they change their minds what definitions they accept from year to year.

Spattersonox

ChemHickey wrote: »

I don't feel good about this. Chemistry is my best (98% in mocks) and I didn't do anything really until now! I need this a1 and just hope what I remember from the mocks will stand for me.

my god.

FaoiSin

Pulled an A2 in the mocks meself but I got pretty lucky Nice paper tomorrow would be appreciated :pac:

sheeba7

What organic experiments are most likely to come up for question 2

FaoiSin

sheeba7 wrote: »

What organic experiments are most likely to come up for question 2

I reckon ethanal/ethanoic acid but there's no way of telling...

drbtrenier

Determined to get an A1 tomorrow! Have taught myself Chemistry for the last 2 years because my school doesn't offer it, and didn't get grinds or anything, so now I really want to prove to everyone that I wasn't a fool for doing it the way I did! Chemistry paper, come at me!

Does anyone think it's likely that they'll bring in a new experiment for Q3 that they've never asked for it before, such as equilibrium expts or halogens as oxidising agents?

ChemHickey

YeaaahFaoiSin wrote: »

sheeba7 wrote: »

What organic experiments are most likely to come up for question 2

I reckon ethanal/ethanoic acid but there's no way of telling...

Maybe ethyne with yield calculations.

Mista

drbtrenier wrote: »

Determined to get an A1 tomorrow! Have taught myself Chemistry for the last 2 years because my school doesn't offer it, and didn't get grinds or anything, so now I really want to prove to everyone that I wasn't a fool for doing it the way I did! Chemistry paper, come at me!

Does anyone think it's likely that they'll bring in a new experiment for Q3 that they've never asked for it before, such as equilibrium expts or halogens as oxidising agents?

Fair play to ya! :P

And don't scare me

Spattersonox

my teacher thinks properties of ethanal/ethanoic acid.

Mista

ChemHickey wrote: »

Maybe ethyne with yield calculations.

Hopefully.. they're handy enough Compared to others anyway

Sunny!!

it will be chromatography and ethene/ethyne for the organic experiment:cool:

Hayezer

Is the whole Bromine and Ethene mechanism the same thing for things like HCL and Ethene?

FaoiSin

Sunny!! wrote: »

it will be chromatography and ethene/ethyne for the organic experiment:cool:

Hate Chromatography

Nazata

Hayezer wrote: »

Is the whole Bromine and Ethene mechanism the same thing for things like HCL and Ethene?

There's just one difference, bromine forms a bridged intermediate compound with the carbonium ion. Apart from that they're practically the same, and I'm pretty sure you could get away without knowing that most if not all years of papers.

Hayezer

YeaaahFaoiSin wrote: »

Hate Chromatography

It's the one that I always skip :L after seeing this, spose I'll have quick look over it.
Ethanal, Winkler and Volatile Liquid :cool:

Spattersonox

chromatography is the most hatefully boring section of the course..