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Edexcel IAL Chemistry Unit 3 WCH03 May June 2016 Discussion Watch

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    Teacher said its 2KHCO3 -> K2CO3 + CO2 + H20. Another mark i lost
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    -418kJ/mol
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    It was easy but I made some simple mistakes and I feel the grade boundary will be like 35 so I feel I will miss out on A 😢

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    Na is also correct so congrats
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    (Original post by AlonsoAMG)
    Teacher said its 2KHCO3 -> K2CO3 + CO2 + H20. Another mark i lost
    ya i got that
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    (Original post by AlonsoAMG)
    Teacher said its 2KHCO3 -> K2CO3 + CO2 + H20. Another mark i lost
    Could somebody please tell me and show me exactly where in our specification does it say you have to know about the decomposition of hydrogen carbonates? I know carbonates are needed but seriously it doesn't even say!
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    (Original post by Sumaiyya1999)
    It was 41%
    Are you sure it 41%, I was the only one who got it amoung my friends, most of them had something around 70 and two had 58%
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    (Original post by I <3 WORK)
    Could somebody please tell me and show me exactly where in our specification does it say you have to know about the decomposition of hydrogen carbonates? I know carbonates are needed but seriously it doesn't even say!
    It does say all group2 HCO3s and LiHCO3 decompose to H20 + CO2 + XO
    While group 1 HCO3s decompose to XCO3 + H20 + CO2
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    (Original post by Sunethra)
    Are you sure it 41%, I was the only one who got it amoung my friends, most of them had something around 70 and two had 58%
    Yes my teacher confirmed it and about 20% of my friends got this answer
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    (Original post by Sumaiyya1999)
    Yes my teacher confirmed it and about 20% of my friends got this answer
    I was stressed about it. That's great if its right. Good luck with the rest of your exam!
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    (Original post by Sunethra)
    I was stressed about it. That's great if its right. Good luck with the rest of your exam!
    Thanks
    Best of luck for ur papers too
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    (Original post by Sumaiyya1999)
    Thanks
    Best of luck for ur papers too
    guys how did u get the shape of the line in the graph i got it straight line going up
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    (Original post by Sumaiyya1999)
    Thanks
    Best of luck for ur papers too
    i got the shape of line in the graph straight line going up
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    (Original post by a.adi1998)
    guys how did u get the shape of the line in the graph i got it straight line going up
    Same
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    (Original post by Sumaiyya1999)
    Same
    i mean its not going down its going up ya3ni like postive corelation
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    (Original post by Saad69)
    It was easy but I made some simple mistakes and I feel the grade boundary will be like 35 so I feel I will miss out on A 😢

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    It was easy but at the same time it was harder than the january paper, so A would be from 28-30
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    (Original post by Hamadtype-)
    It was easy but at the same time it was harder than the january paper, so A would be from 28-30
    guys in the question of the graph i got its shape like this
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    (Original post by Sumaiyya1999)
    Same
    Like a directly proportional graph right?

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    (Original post by I <3 WORK)
    Eeek I wrote 206 - 210 is that correct? Because I didn't want go below so I only went above. :/
    I have no idea. I think I recall reading somewhere that it was + or - 2 from a actual boiling point?
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    (Original post by Saad69)
    Like a directly proportional graph right?

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    yes
 
 
 
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