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    (Original post by randoms132)
    I put P then changed to S WOW 😓😓


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    Sameee 😂😂😂 but I think it was only 2 marks so hopefully it won't mean much?


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    I screwed up big time
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    (Original post by justinamarina)
    Answer could have been sulfur Or phosphorus as they are both in period 3 and acidic
    It specifically said from Na to P
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    If you read the question it specifically stated period 3 elements from Na - P

    S is after P, hence not the answer to the question.
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    what did every one get for the percentage purity- i think i got 49.3 or something like it
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    (Original post by amphoterism)
    H -196 kJ mol-1
    S -189 K J mol-1
    G -135 kJ mol-1

    Btw what is the sign from answer -189 K J mol-1 indicates about the product relative to the reactants?
    I got that too
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    If you read the question it specifically stated period 3 elements from Na - P

    S is after P, hence not the answer to the question
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    anyone put Zn and HCl , blue

    for Cr3+ to Cr2+ ???
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    for percentage purity i got around 94%
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    What is the colour of (Cr(H2O)6)2+? And how to get it?
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    (Original post by ravichauhan11)
    anyone put Zn and HCl , blue

    for Cr3+ to Cr2+ ???
    Yeah Zn and HCl.
    Cr[H2O]6^2+ is Blue solution.
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    what did everyone get of the percentage purity question- i think i got something like 49.3
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    (Original post by amphoterism)
    H -196 kJ mol-1
    S -189 K J mol-1
    G -135 kJ mol-1

    Btw what is the sign from answer -189 K J mol-1 indicates about the product relative to the reactants?
    I got that as well
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    (Original post by zombaldia)
    Was X the one that formed an acid? If so I did S too
    Aqa was being really sly about this, at the top it said 'this question is about period 3 metals from Na to P' so S isnt in the range eventhough the chemmistry is correct :/
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    (Original post by zahraaj1)
    doesnt the solubility increase? or does it decrease?..

    The reaction was exothermic so if temperature increased, the reaction would shift to the left so solubility would decrease
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    for percentage purity i got around 94.3%
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    (Original post by amphoterism)
    H -196 kJ mol-1
    S -189 K J mol-1
    G -135 kJ mol-1

    Btw what is the sign from answer -189 K J mol-1 indicates about the product relative to the reactants?
    i put product is more ordered
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    (Original post by BushDiddit)
    I screwed up big time
    Same and I know where I went wrong as well. So many mistakes I could have not made...
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    everything was easy on that paper except that percentage one. can someone quickly explain it to me.
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    (Original post by amphoterism)
    What is the colour of (Cr(H2O)6)2+? And how to get it?
    Blue, as Cr2+ ions are blue. I nearly put ruby red like a muppet!!
 
 
 
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