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

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Comments

  • Registered Users Posts: 439 ✭✭RML


    Hopefully this exam wont be as disastrous like Biology.


  • Closed Accounts Posts: 1,696 ✭✭✭outnumbered


    RML wrote: »
    Hopefully this exam wont be as disastrous like Biology.

    we can only pray


  • Registered Users Posts: 107 ✭✭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)


  • Registered Users, Registered Users 2 Posts: 346 ✭✭weirdspider


    I loves me some sxc chemistry <33


  • Registered Users Posts: 161 ✭✭Hamza Malik


    So any predictions anyone? :)


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  • Registered Users Posts: 20 WigglinJelly


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


  • Registered Users Posts: 20 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!


  • Registered Users, Registered Users 2 Posts: 893 ✭✭✭ray2012


    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?


  • Registered Users Posts: 46 lizardspock


    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!


  • Registered Users Posts: 20 WigglinJelly


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


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  • Registered Users, Registered Users 2 Posts: 346 ✭✭weirdspider


    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


  • Registered Users Posts: 20 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.


  • Registered Users, Registered Users 2 Posts: 346 ✭✭weirdspider


    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?


  • Registered Users, Registered Users 2 Posts: 2,326 ✭✭✭Scuid Mhór


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


  • Registered Users, Registered Users 2 Posts: 1,988 ✭✭✭Monsieur Folie


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


  • Registered Users Posts: 482 ✭✭woopah92


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


  • Registered Users Posts: 161 ✭✭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.


  • Registered Users, Registered Users 2 Posts: 59 ✭✭Kingkumar


    equilbrium <
    :3 . 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 :)


  • Posts: 0 [Deleted User]


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


  • Registered Users Posts: 211 ✭✭_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!


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  • Closed Accounts Posts: 2,827 ✭✭✭Prodigious


    My favourite too :3 (with Maths)

    Experiments: Ethanal & Iron Tablets.

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


  • Registered Users Posts: 20 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 :o


  • Registered Users, Registered Users 2 Posts: 1,988 ✭✭✭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!


  • Registered Users, Registered Users 2 Posts: 893 ✭✭✭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 ;)


  • Registered Users Posts: 20 WigglinJelly


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


  • Registered Users Posts: 46 lizardspock


    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 :D
    Although i still hate those awful equations that you have to remember...


  • Registered Users Posts: 112 ✭✭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...


  • Registered Users Posts: 23 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


  • Registered Users Posts: 84 ✭✭meleanor


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


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  • Posts: 0 [Deleted User]


    Prodigious wrote: »
    My favourite too :3 (with Maths)

    Experiments: Ethanal & Iron Tablets.

    Not doing the Organic question, so I might do the third experiment question.
    a lot of people don't like the organic question! I find it quite easy and a good question to pick up marks on :o

    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!


  • Registered Users, Registered Users 2 Posts: 2,827 ✭✭✭bpb101


    production of sulfuric acid is my pick of the day


  • Registered Users Posts: 84 ✭✭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.


  • Posts: 0 [Deleted User]


    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.


  • Registered Users Posts: 20 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! :)


  • Registered Users Posts: 84 ✭✭meleanor


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


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  • Registered Users, Registered Users 2 Posts: 4,080 ✭✭✭EoghanIRL


    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.


  • Posts: 0 [Deleted User]


    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."


  • Registered Users Posts: 97 ✭✭Raeral


    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


  • Posts: 0 [Deleted User]


    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


  • Registered Users Posts: 97 ✭✭Raeral


    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 :)


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  • Registered Users Posts: 22 Lonepiper


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


  • Posts: 0 [Deleted User]


    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


  • Registered Users, Registered Users 2 Posts: 4,248 ✭✭✭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.


  • Registered Users, Registered Users 2 Posts: 428 ✭✭Acciaccatura


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


  • Closed Accounts Posts: 1,696 ✭✭✭outnumbered


    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-)


  • Registered Users, Registered Users 2 Posts: 402 ✭✭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 >.<


  • Registered Users, Registered Users 2 Posts: 428 ✭✭Acciaccatura


    There's still time. B-)

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


  • Closed Accounts Posts: 2,827 ✭✭✭Prodigious


    Can't wait ! :D


  • Registered Users Posts: 161 ✭✭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 :3


  • Closed Accounts Posts: 1,696 ✭✭✭outnumbered


    I know the soap so well. I can draw the structure with my eyes closed :3
    do we need to be able to draw that big, long structure of sopa with the polar and non polar parts?


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