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

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24567…33

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    #32
    bpb101
    Registered Users Posts: 2,827 ✭✭✭bpb101


    production of sulfuric acid is my pick of the day


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    #33
    meleanor
    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.


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    #34
    [Deleted User]
    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.


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    #35
    WigglinJelly
    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! :)


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    #36
    meleanor
    Registered Users Posts: 84 ✭✭meleanor


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


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    #37
    EoghanIRL
    Registered Users Posts: 4,080 ✭✭✭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.


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    #38
    [Deleted User]
    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."


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    #39
    Raeral
    Registered Users Posts: 97 ✭✭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


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    #40
    [Deleted User]
    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


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    #41
    Raeral
    Registered Users Posts: 97 ✭✭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 :)


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    #42
    Lonepiper
    Registered Users Posts: 22 ✭Lonepiper


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


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    #43
    [Deleted User]
    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


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    #44
    Slow Show
    Registered Users 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.


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    #45
    Acciaccatura
    Registered Users Posts: 428 ✭✭Acciaccatura


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


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    #46
    outnumbered
    Closed Accounts Posts: 1,696 ✭✭✭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-)


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    #47
    Tommyrawr
    Registered Users 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 >.<


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    #48
    Acciaccatura
    Registered Users Posts: 428 ✭✭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:


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    #49
    Prodigious
    Closed Accounts Posts: 2,827 ✭✭✭Prodigious


    Can't wait ! :D


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    #50
    Hamza Malik
    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


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    #51
    outnumbered
    Closed Accounts Posts: 1,696 ✭✭✭outnumbered


    Hamza Malik wrote: »
    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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    #52
    lizardspock
    Registered Users Posts: 46 ✭lizardspock


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

    Yep. Looks so sciency when you draw it out:D


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    #53
    outnumbered
    Closed Accounts Posts: 1,696 ✭✭✭outnumbered


    This is what i am/will be studying for the chemistry exam:

    No.1 Exp

    No.2 Exp

    No.3 Exp

    Short questions i.e. All defintitions, +whatever will cover me from below. Always manageable anyway.

    Fuels and thermochem

    Equilibrium/Rates

    Acids+bases/Ph and indicator/Water

    for the option question: (Radioactivity/Electronegativity/Electrolysis/Gases/Stoichiometry/Oxidation and reduction/Machines)

    As a very last resort+an extra question, I will lightly study the important stuff in Q5.


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    #54
    outnumbered
    Closed Accounts Posts: 1,696 ✭✭✭outnumbered


    Acciaccatura wrote: »
    Alright, I'll try do one today, but I'm warning ye, I can't sing very well :pac:
    We're waiting, waiting,waiting, waiting, waiting for something to happen very soon..... #Humms Blissfully


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    #55
    woopah92
    Registered Users Posts: 482 ✭✭woopah92


    Q5 is the easy stuff. I don't get why people don't do it. :/


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    #56
    outnumbered
    Closed Accounts Posts: 1,696 ✭✭✭outnumbered


    woopah92 wrote: »
    Q5 is the easy stuff. I don't get why people don't do it. :/
    I usually don't have to. It's the worst answered question in chemistry....
    It's do-able but It's not nice in my opinion. :)


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    #57
    Slow Show
    Registered Users Posts: 4,248 ✭✭✭Slow Show


    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 >.<

    When you say a full question do you mean like the soap question? How could they give a full question on just one family? :confused:


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    #58
    comeclosa
    Registered Users Posts: 112 ✭✭comeclosa


    outnumbered wrote: »
    I usually don't have to. It's the worst answered question in chemistry....
    It's do-able but It's not nice in my opinion. :)

    I'm with you completely there... Q5 is also like.. the "paragraph answer" question and let's face it who wants to write paragraphs in Chemistry? ;)


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    #59
    Scuid Mhór
    Registered Users Posts: 2,326 ✭✭✭Scuid Mhór


    well i FOR ONE enjoy writing paragraphs in chemistry!


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    #60
    Slow Show
    Registered Users Posts: 4,248 ✭✭✭Slow Show


    Yeah I used to think Q5 was a great, dependable q and thought I'd pulled 50/50 in my mocks, only got 35 and I'm still not entirely sure why. If I do it it'll be one out of at least nine!


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    #61
    Hamza Malik
    Registered Users Posts: 161 ✭✭Hamza Malik


    Wanna do a quiz? It might help us with a abit of study? Sooo why do you add sulfuric acid in the titrations?


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