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    (Original post by pravster)
    just remember
    mash
    baws
    cawcs
    omg this is brilliant i i think you may have just saved my life
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    Definition of equilibrium please?
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    (Original post by stressthistest)
    anyone got any ideas what some of the c3 questions will be on?? Also, help on titration calculations??
    I found this website helpful:
    http://www.docbrown.info/page04/4_73calcs12vct.htm
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    How does a hydrogen ion change into a hydrogen atom? very confused aha helppp
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    equilibrium is when reactions happen at the same rate of each direction
    If that makes sense?
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    Guys, if you're stuck with moles let me help It's simple I promise, I'll make it super basic
    When you look at carbon, the RFM (atomic mass) is 12, so one mole of carbon is 12 grams
    Hydrogen RFM is 1, so one mole of hydrogen is 1 gram
    Chlorine is 24? (Thats just from memory I'm really sorry if it's wrong) so one mole of chlorine would be 24 grams

    So 6 moles of hydrogen is 6 grams and 1 mole of chlorine is 24 grams, so CH6 is 30 grams!
    Hope I helped it's all I know!
    Good luck everybody! You'll do better than you think
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    https://www.youtube.com/watch?v=SgUuWYU9W84
    Really useful video
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    I think there will be a 6 marker either on Crystallisation of the exothermic reaction of heating pads
    or failing that, titration (they love recycling this one)
    And there will almost definitely be a question on the Haber Process on the C3 paper so prepare for that
    and electrolysis, acids & salts & bases too
    I think the consolation comes where this years exams will be a little easier than previous years as, doing past papers, they seem to have gotten the short straw with the harder topics in the past couple!
    The biology one I found was very easy but with that comes higher grade boundaries.
    Good luck for tomorrow everyone! x
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    (Original post by fmalik99)
    How does a hydrogen ion change into a hydrogen atom? very confused aha helppp
    If atoms lose electrons they become positively charged ions (cations). If atoms gain electrons, they become negatively charged ions (anions). So it's basically the other way round: if an ion gains electrons it forms a positively charged atom and if an ion loses electrons it forms a negatively charged atom
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    (Original post by gennabm)
    if atoms lose electrons they become positively charged ions (cations). If atoms gain electrons, they become negatively charged ions (anions). So it's basically the other way round: If an ion gains electrons it forms a positively charged atom and if an ion loses electrons it forms a negatively charged atom
    thank you so much :d
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    (Original post by fmalik99)
    thank you so much :d
    no problem good luck tomorrow!
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    (Original post by pravster)
    Just remember
    MASH
    BAWS
    CAWCS
    What do they stand for?!?
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    (Original post by Katiemooney)
    I'm so nervous chemistry is my absolute worst subject, I worked for days straight on my isa and got an A* but I'm terrified I'm going to fail these exams, I literally know bonding help me ����������
    Poll
    Do you agree with the PM's proposal to cut tuition fees for some courses?

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