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OCR Equilirium question. watch

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    Can anyone explain this question? I've been attempting it for a while and i don't understand why the values need to be multiplied by 5 and not divided by 2? Can someone xplain?
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    (Original post by AqsaMx)
    Can anyone explain this question? I've been attempting it for a while and i don't understand why the values need to be multiplied by 5 and not divided by 2? Can someone xplain?
    Firstly, why do you think you are dividing by 2?

    As for the multiplication by 5, I don't see how that fits in.
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    (Original post by RMNDK)
    Firstly, why do you think you are dividing by 2?

    As for the multiplication by 5, I don't see how that fits in.
    The mark scheme says that you need to multiply by 5 which is what I don't understand. I thought that you divide the values by 2 as that's the volume but I may be wrong :|
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    (Original post by AqsaMx)
    The mark scheme says that you need to multiply by 5 which is what I don't understand. I thought that you divide the values by 2 as that's the volume but I may be wrong :|

    You're right. To get concentration you divide moles by volume.

    But what's the units of volume?
    Spoiler:
    Show
    dm3
    The volume they give you is 200cm3
    How do you convert that to the new units?

    I really don't see why the multiplying by 5 is necessary..
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    (Original post by RMNDK)
    You're right. To get concentration you divide moles by volume.

    But what's the units of volume?
    Spoiler:
    Show
    dm3
    The volume they give you is 200cm3
    How do you convert that to the new units?

    I really don't see why the multiplying by 5 is necessary..
    Ohh.. Oops. It's meant to be 0.2. Dividing by 0.2 and t.multiplying my five is equivalent so it makes sense now :3
 
 
 
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