***2013 LC Chemistry Before/After***

outnumbered

Should be fine.
Hopefully radioactivity and electrolysis for them half questions!

RML

Hopefully this exam wont be as disastrous like Biology.

outnumbered

RML wrote: »

Hopefully this exam wont be as disastrous like Biology.

we can only pray

aoifemcg94

RML wrote: »

Hopefully this exam wont be as disastrous like Biology.

If it is that's two As flushed away on me! After history is over I've only chemistry so it'll be hard core from then on.
The SEC won't **** me over again! (I hope)

weirdspider

I loves me some sxc chemistry <33

Hamza Malik

So any predictions anyone?

WigglinJelly

Anyone have any ideas what is definite to come up? Are you guys leaving out the experiments asked last year?

WigglinJelly

are you guys leaving out the experiments asked last year?:/
Oh, and also, what about the experiments that can't be carried out in schools anymore.. they couldn't out those up as long questions.. there'd be uproar!

ray2012

WigglinJelly wrote: »

are you guys leaving out the experiments asked last year?:/
Oh, and also, what about the experiments that can't be carried out in schools anymore.. they couldn't out those up as long questions.. there'd be uproar!

One of the experiments that can't be done in schools came up last year (I think it was) in part of a long question. It's on the course, so they can put it up.

I'm dreading this exam. One of my worst subjects. Anybody have any predictions for the experiments and the main long questions that may come up?

lizardspock

WigglinJelly wrote: »

are you guys leaving out the experiments asked last year?:/
Oh, and also, what about the experiments that can't be carried out in schools anymore.. they couldn't out those up as long questions.. there'd be uproar!

I actually wouldn't be surprised if one of the ethanoic acid/ethanal experiments came up. We can't do them yet we're still required to know them, they haven't been taken off the syllabus soo.. Pretty unfair but one of them came up on my mock paper, think it was ethanal
I'd say just learn them!

WigglinJelly

yeah thats what my grinds teacher said too.. seems pretty unfair though if we can't actually DO the experiment.

weirdspider

WigglinJelly wrote: »

are you guys leaving out the experiments asked last year?:/
Oh, and also, what about the experiments that can't be carried out in schools anymore.. they couldn't out those up as long questions.. there'd be uproar!

You never know, theory from them might appear in different places across the exam paper so I'd learn em

WigglinJelly

will do I'm hoping the option question is a nice one.. I have the environmental option about the carbon/nitrogen cycle etc. covered (which I had already done in Biology) so it's handy enough.

weirdspider

WigglinJelly wrote: »

yeah thats what my grinds teacher said too.. seems pretty unfair though if we can't actually DO the experiment.

IIRC we done it anyway. Whats the actual problem with doing it?

Scuid Mhór

My last exam.... can't come soon enough!

Monsieur Folie

Those experiments (ethanal/ethanoic acid) are grand, I'd be delighted if one was on the paper!

woopah92

Yay chemistry........... I just hope this goes well. :pac:

Hamza Malik

For experiments learn the soap, ethanol, and iron tablets.. For organic revise mechanisms and naming and drawing the alkanes etc.. For the options id say electrochemistry. Oh and equilibrium is due <--- awful chapter.

Kingkumar

equilbrium <

---

. I actually can't wait for chemistry never thought i'd say this about an exam. As for predictions i think i think a water experiment is going to come up and then titration and an organic obviously. also think that properties of esters experiment will come in section b. anyway good luck all

My favourite subject A2 in mocks so just to spend a few days to push that up

_LilyRose_

Love the positivity in this thread, my favourite subject and I've five days off to prepare! And I'm actually motivated because this is my A1 subject and if I don't get it I'll be so mad at myself!

Prodigious

My favourite too (with Maths)

Experiments: Ethanal & Iron Tablets.

Not doing the Organic question, so I might do the third experiment question.

WigglinJelly

a lot of people don't like the organic question! I find it quite easy and a good question to pick up marks on

Monsieur Folie

The 5 days for it is bliss! I already have tabled out what I'm going to try and cover. It would take a very awkward paper to throw me for this!

ray2012

I feel like I'm the only person on this thread who hates this subject and finds it really difficult! :O

Give me some of yer smartness

WigglinJelly

I'm trying to stay positive about it, but jesus... it's so hard

lizardspock

Hamza Malik wrote: »

For experiments learn the soap, ethanol, and iron tablets.. For organic revise mechanisms and naming and drawing the alkanes etc.. For the options id say electrochemistry. Oh and equilibrium is due <--- awful chapter.

Used to be anti-equilibrium until about 2 weeks ago, could never make sense of it! now I'm hoping for a full question
Although i still hate those awful equations that you have to remember...

comeclosa

I'd LOVE a long Equilibrium question as long as they don't throw in anything about those pesky little Equilibrium Experiments.
Also, anyone think that the Industrial Chemistry option is LONG overdue? I'll cover myself for that...

D0nal

comeclosa wrote: »

I'd LOVE a long Equilibrium question as long as they don't throw in anything about those pesky little Equilibrium Experiments.
Also, anyone think that the Industrial Chemistry option is LONG overdue? I'll cover myself for that...

I'm not so sure. the most common case study is IFI Cobh Co. Cork. This plant no longer exists. The SEC love to feel they are so "modern" asking about CFC's and global warming in question 11c

meleanor

As long as everyone has learned off their marking schemes for two years, should be fine!

Prodigious

Prodigious wrote: »

My favourite too (with Maths)

Experiments: Ethanal & Iron Tablets.

Not doing the Organic question, so I might do the third experiment question.

WigglinJelly wrote: »

a lot of people don't like the organic question! I find it quite easy and a good question to pick up marks on

As in Fuels and Heats q6? Or Q8/9 with the mechanisms etc. I hate the Q8/9, love q6.
And we had to do most of the organic experiments in a local college but we didn't have a set up per pair so if you didn't have a job you just observed and I don't understand them at all! So I'm hoping for q3 to be nice cause I won't be able to do q2!

bpb101

production of sulfuric acid is my pick of the day

meleanor

Equilibrium never seems to go my way. Experiment Qs and divided question 10s and 11s are beauties, as well as Q5,6,7 theory and organics.

Also I'm thinking Hund's rule of maximum multiplicity or perhaps Pauli's exclusion principle will be asked in q5.
I don't think they've ever been asked? You'd just need to know them to apply knowledge.

WigglinJelly

Folens online have good videos of the experiments if you need to watch them.. good revision to watch someone else doing them
You just go on the folensonline website and make an account first I think.. then click on Chemistry Live book and all the experiments come up!

meleanor

Listen to Justin Timberlake > Chemistry study.
Bad time to discover spotify -_-

EoghanIRL

[Deleted User] wrote: »

Also I'm thinking Hund's rule of maximum multiplicity or perhaps Pauli's exclusion principle will be asked in q5.
I don't think they've ever been asked? You'd just need to know them to apply knowledge.

I'd say they are more like short questions for question 4.

EoghanIRL

EoghanIRL wrote: »

I'd say they are more like short questions for question 4.

I'd say they could be also but I do think it could be a part of question 5. They've split that question into 3 different parts before and it would be nice to have:
"Define Hund's rule of maximum multiplicity.
Show the arrangement of electrons in a x atom, showing each sub energy level."

Raeral

Deleted User wrote: »

Also I'm thinking Hund's rule of maximum multiplicity or perhaps Pauli's exclusion principle will be asked in q5.
I don't think they've ever been asked? You'd just need to know them to apply knowledge.

Remind me of Hunds rule again. I don't recall ever having learnt it :P

Raeral

Raeral wrote: »

Remind me of Hunds rule again. I don't recall ever having learnt it :P

Hund's rule states that when there are 2 or more orbitals of equal energy available, electrons will fill them singly before in pairs.

My teacher always says think of it like getting on a bus, you never sit beside someone unless you have to. :P

Raeral

Deleted User wrote: »

Hund's rule states that when there are 2 or more orbitals of equal energy available, electrons will fill them singly before in pairs.

My teacher always says think of it like getting on a bus, you never sit beside someone unless you have to. :P

Ah yes, I remember it now. Cheers

Lonepiper

Could anyone explain how to find the instantaneous rate on a graph actually?

Lonepiper

Lonepiper wrote: »

Could anyone explain how to find the instantaneous rate on a graph actually?

Draw a tangent to the curve at the point and find the slope of the tangent

Slow Show

Lonepiper wrote: »

Could anyone explain how to find the instantaneous rate on a graph actually?

I think the book does it in a slightly different way but what I do is get the point on the graph, draw a tangent through it and use Y2-Y1/X2-X1 to get the slope of the tangent, which is the rate.

Acciaccatura

Ahh, I forgot to make that Youtube video of the definition songs I made. I have failed you, fellow chemistry students

outnumbered

Acciaccatura wrote: »

Ahh, I forgot to make that Youtube video of the definition songs I made. I have failed you, fellow chemistry students

There's still time. B-)

Tommyrawr

I think esters will come up in the organic section. They havent had a full Question since 2004 i think.
Well if they do this year thats my favorite section ruined. I just dont understand them at all >.<

Acciaccatura

outnumbered wrote: »

There's still time. B-)

Alright, I'll try do one today, but I'm warning ye, I can't sing very well :pac:

Prodigious

Can't wait !

Hamza Malik

Tommyrawr wrote: »

I think esters will come up in the organic section. They havent had a full Question since 2004 i think.
Well if they do this year thats my favorite section ruined. I just dont understand them at all >.<

I know the soap so well. I can draw the structure with my eyes closed

outnumbered

Hamza Malik wrote: »

I know the soap so well. I can draw the structure with my eyes closed

do we need to be able to draw that big, long structure of sopa with the polar and non polar parts?