Chemistry unit 6 June 2016

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    What did you guys write for the ammonium disulphate question?
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    I really do think it was harder than Jan one! Especially under the exam stress. Ugh 😭
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    (Original post by AvWOW)
    I said Zn(OH)4
    What is that question about?
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    (Original post by AvWOW)
    I said Zn(OH)4
    It's [Zn (OH)4]^2-
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    (Original post by anonymousawesome)
    What did you guys write for the ammonium disulphate question?
    I wrote that it'll result in less of equilibrium mixture, so less of NaOH needed idk I forgot but something along those lines. Could be wrong - I wrote it last minute
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    (Original post by Nimra99)
    I think grade boundaries are going to be low.... Hope for the best
    Lol bruh I hope so. Us waqt I couln't tell cuz dad sath thy lkn na wo kc conc kuch mera ghalat hgya ***** xD
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    (Original post by Sandy_Vega30)
    It's [Zn (OH)4]^2-
    haha yeah ooops I meant that.
    Oh and with excess ammonia it was Zn(NH3)4 ^2- or Zn(NH3)6^2- ???
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    (Original post by retrobaht)
    I wrote that it'll result in less of equilibrium mixture, so less of NaOH needed idk I forgot but something along those lines. Could be wrong - I wrote it last minute
    Concentration doesn't affect Kc... only temperature does
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    (Original post by RizK)
    -pt wire should be salt bridge
    -Vanadium electrode cannot be used
    -H should be in 2mol concentration
    Heyy I wrote electrodes should be completely submerged instead of H being 2M
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    What is the answer of the Ecell value in Q4?
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    Zn(OH)4.
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    It was so hard!:unimpressed:

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    (Original post by Angelina johnson)
    What was the Kc value ?
    I got 7.32 but most in my class got the right one xD
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    (Original post by sonam_28)
    What were the burette and pipetter answers? Does the volume change?
    And was zinc Zn(OH)6 or Zn(OH)4???
    I wrote Zn(OH)6 but I guess it doesn't matter!
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    I think it does not matter whether is znoh4 or znoh6 except the case that is copper ion which always has a corrdination number of 4.
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    (Original post by Aimen.)
    Heyy I wrote electrodes should be completely submerged instead of H being 2M
    I thought its H 2m because in the earlier part the half equation said 2H+.. im not sure though. I could be wrong
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    (Original post by kingsleylam)
    What is the answer of the Ecell value in Q4?
    Step 1 +0.83 step 2 +0.17
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    Could no. Of paeks in low res nmr be used todistinguish P, Q and R? What are your answers guys?
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    i think someone should start a petition
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    (Original post by Quirky01)
    Could no. Of paeks in low res nmr be used todistinguish P, Q and R? What are your answers guys?
    I wrote Yes, because they have different no. Of peaks...then I stated the no. of peaks for each isomer.
 
 
 
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