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    (Original post by jonnyofengland)
    Glad to see other people share my dread of buffer solutions.

    I don't suppose anyone who is good with them would be able to explain them to me?
    http://www.docbrown.info/page07/equilibria6.htm - that's good a good-ish section on them, you have to scroll down though

    http://www.chemguide.co.uk/physical/...ffers.html#top

    Hope they help
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    Wait...
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    (Original post by jonnyofengland)
    Glad to see other people share my dread of buffer solutions.

    I don't suppose anyone who is good with them would be able to explain them to me?
    You got a weak acid and it's sodium salt.

    e.g. CH3COOH and CH3COONA

    The weak acid partially dissociates so you have loads of CH3COOH
    The sodium salt almost fully dissociates so you have loads of methyl carboxylate ions (and sodium ions). This is your buffer.

    Adding Acid

    The H+ ions from the acid reacts with the methyl carboxylate ions forming ethanoic acid. Most of the H+ ions are removed so pH returns to normal.

    Addid Base

    The OH- ions react with the ethanoic acid to produce methyl carboxylate ions and water. Most of the OH- ions are removed so pH returns to normal.

    - This only works for a limited volume of acid/base added until it overcomes the solution and the buffer doesn't work.

    Hope this helps
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    Thanks Scaryhair and Daniel! :top2:

    (Original post by ADREAM)
    All you've got left? I thought that was the main bed-rock behind Unit 4 Chem, no? :p:
    I hate the inorganic chemistry with a passion though. :yep: pH, buffer solutions, all that k-stuff - just urgh! Shame it was the main focus on one of my Ox interviews!
    Well, what I mean is that I understand pretty much all of the theory, now it's just committing various temperatures, catalysts and effervescences to memory.
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    (Original post by jonnyofengland)
    Thanks Scaryhair and Daniel! :top2:



    Well, what I mean is that I understand pretty much all of the theory, now it's just committing various temperatures, catalysts and effervescences to memory.
    Ah, I see... Good luck!
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    (Original post by lotusx)
    @!MEna: BYB4 may have more topics in, but BYB5 is a load of nonsense...damn ecology!
    Yeah you can say that again.

    I've just been reading up on classification and this is how I've learned the hierarchy...

    Kate
    Perry
    Can
    Order
    Flaming
    Grilled
    Steak

    Kingdom
    Phylum
    Class
    Order
    Family
    Genus
    Species

    Anyone else using acronyms to help with revision? :toofunny:
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    (Original post by !MEna)
    Yeah you can say that again.

    I've just been reading up on classification and this is how I've learned the hierarchy...

    Kate
    Perry
    Can
    Order
    Flaming
    Grilled
    Steak

    Kingdom
    Phylum
    Class
    Order
    Family
    Genus
    Species

    Anyone else using acronyms to help with revision? :toofunny:
    Got a better one than that...
    King
    Phillip
    Comes
    Over
    For
    Good
    Sex

    :p:
    • Thread Starter
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    (Original post by scaryhair)
    Got a better one than that...
    King
    Phillip
    Comes
    Over
    For
    Good
    Sex

    :p:
    Haha now that will be stuck in my head! Cheers! :rofl:
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    I'm get to start revision
    Tomorrow shall be the day.
    I seriously have to get started.
    I don't know anyone that hasn't started revision yet
    But I do only have BYB4 and C3 - not so much compared to others.

    (Original post by !MEna)
    There was a question in my CPT4 mock and it was "What is a thread?" You will not believe the answer I put. :ninja: :rofl:
    What did you put? I wanna know
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    (Original post by scaryhair)
    Got a better one than that...
    King
    Phillip
    Comes
    Over
    For
    Good
    Sex

    :p:
    Ahha that's brilliant. Thank you. :grin:
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    (Original post by !MEna)
    Haha now that will be stuck in my head! Cheers! :rofl:
    (Original post by Holsy)
    Ahha that's brilliant. Thank you. :grin:

    Lol, don't thank me, thank one of my Biology teachers! She's brilliant! Tiny, innocent looking thing and then her cover is blown when she comes out with stuff like this :p:
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    (Original post by scaryhair)
    Lol, don't thank me, thank one of my Biology teachers! She's brilliant! Tiny, innocent looking thing and then her cover is blown when she comes out with stuff like this :p:
    It's way better than my one! I shall be using this haha
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    (Original post by scaryhair)
    Lol, don't thank me, thank one of my Biology teachers! She's brilliant! Tiny, innocent looking thing and then her cover is blown when she comes out with stuff like this :p:
    Hahaha! You sure have one interesting teacher!
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    (Original post by ADREAM)
    Hahaha! You sure have one interesting teacher!
    She's quite mad, yes. Once she walked out of the classroom to get some past papers, and in an ordinary voice warned us not to eat any old people!
    She's great though
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    (Original post by scaryhair)
    She's quite mad, yes. Once she walked out of the classroom to get some past papers, and in an ordinary voice warned us not to eat any old people!
    She's great though
    Haha!

    My biology teacher, sorry ma'am if you're reading this, is even worse. She doesn't understand the syllabus at all. I mean, when we go through mark schemes, she refuses to accept it in almost every circumstance, even when we tell her 'No, Miss - you do X and Y, not Z.'

    She leaves our lessons to go and eat food, constantly. Being honest here! :yep: There was one time where she refused that there still was three quarters of an hour till lunch, so she got a ladder and fast-forwarded the clock to lunch-time and let us all go. Sometimes it borders on the insane, but still - we love her! :yep:
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    King
    Prawn
    Curry
    Or
    Fat
    Greasy
    Sausages
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    we were always told

    King
    Phillip
    Came
    Over
    For
    Gold &
    Silver

    Spanish armada or something? I think i'll remember the 'good sex' one better though
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    I've been having fun with organic synthesis on my new white board off ebay!

    Feel free to use it for revision and if there are any errors or additions don't hesitate to let me know. :grin:

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    is it only me, or everyone notices while revising for chem how powerful alcohols are!
    i mean, seriously nothing goes on without them!
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    (Original post by Holsy)
    I like that

    I have 4xA3 sheets taped together with a reaction pathway map not dis similar to that stuck up on my bedroom wall.
 
 
 
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