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  1. D

    CHEMISTRY PAPER 34 On 31st MAY

    i think, exactly that..But a conclusion can vary for example, sulfate and sulfite both might be written in a conclusion if excess dilute strong acid is added later, or not added. So we must all read the questions carefully and not make mistakes thinking that "Its sulfate! the guess was right!"
  2. D

    CHEMISTRY PAPER 34 On 31st MAY

    Yes the most close to what is coming in our paper.. If similar q. comes in our paper, do we have to take 2( or 3?) time readings with mean? or only one?
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    CHEMISTRY PAPER 34 On 31st MAY

    nooo not missing.. Copper/sulfate/carbonate should be in your mind..
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    CHEMISTRY PAPER 34 On 31st MAY

    hahaha that usually never happens : p The confidential instructions are confirmed by multiple teachers. But everyone should be prepared for each type of question, as our reagents can be used in many ways.
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    CHEMISTRY PAPER 34 On 31st MAY

    yes i am almost certain, the reaction will be the one video i posted previously. be prepared. It is possible but unlikely.
  6. D

    CHEMISTRY PAPER 34 On 31st MAY

    so we are expecting this reaction to come so, when timing, do we have to take multiple readings, then average. Or one reading only?
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    CHEMISTRY PAPER 34 On 31st MAY

    if those are the first 2 q's then salts must be sodium carbonate and copper sulfate. But... where will be sodium thiosulfate be used then?
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    CHEMISTRY PAPER 34 On 31st MAY

    Man HOW THE HELL DO YOU THINK IT'S ILLEGAL!? It is totally not! if you do not want to post here, please please Private message us. :p
  9. D

    CHEMISTRY PAPER 34 On 31st MAY

    Thanks Alot! Can you confirm if my uncertainties are correct.. I am confused about the 2d.p balance.. is it 0.01 or 0.005?
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    CHEMISTRY PAPER 34 On 31st MAY

    Ok so no one wants to reply me regarding the error thing, i totally understand, its the last day :p but please confirm this. 2 d.p balance uncertainty = +-0.01 g measuring cylinder = +- 0.5 cm3 burette = +-0.05 cm3 thermometer = +-0.5 *C we multiply this by number of readings divided by our...
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    CHEMISTRY PAPER 34 On 31st MAY

    according to the picture Hassan (SHT) posted (thanks by the way), I think copper, sulfate and carbonate ions will be coming. Guys please tell about errors and uncertainties!! what should i know? I know about percentage error one.. where (smallest division of instrument x number of readings...
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    CHEMISTRY PAPER 34 On 31st MAY

    hey can anyone tell all the things we have to learn to find percentage errors/errors uncertainty etc
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    CHEMISTRY PAPER 34 On 31st MAY

    lol please tell! thanks! :)
  14. D

    CHEMISTRY PAPER 34 On 31st MAY

    Can anyone please provide experimental values for some or even one of these papers? it would help me solve them. Its just hard to do so, without any values to begin with.
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    CHEMISTRY PAPER 34 On 31st MAY

    hey, what about the salts question? for rate i'll make sure to do all the papers you stated above..
  16. D

    CHEMISTRY PAPER 34 On 31st MAY

    What makes sense to me is that, if Na2S2O3 is coming along with starch indicator... shouldn't it be the sodium thiosulfate titration ? Please explain in detail.. how this might be used in other ways...
  17. D

    CHEMISTRY PAPER 34 On 31st MAY

    No you wont!! its a guess.. its not like the papers are leaked!
  18. D

    CHEMISTRY PAPER 34 On 31st MAY

    Answer this please!
  19. D

    CHEMISTRY PAPER 34 On 31st MAY

    anyone got any notes or tips?? all my papers went well just p34 i got 4 days to prep :p i will go through these guesses of course but do not want to be depending on them.
  20. D

    BIOLOGY PAPER 34 MAY/JUNE 2017

    i got for 2% and 0% more than 240.. and for rest i got below 36 seconds... The 2% as well just turned pale pink pretty fast in like 100 seconds but was stuck there for more than 240 seconds
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