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    A 25cm3 sample from the dead sea gace 17.885g of silver chloride precipitate. Work out the concentration of chlorine ions in dead sea.
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    (Original post by janelopez)
    A 25cm3 sample from the dead sea gace 17.885g of silver chloride precipitate. Work out the concentration of chlorine ions in dead sea.
    Hmm. This might be tough.

    Anyway, I'd guess that:
    1 - convert 25cm3 into dm3 by dividing by 1000
    2 - work out the percentage of chlorine that comprises silver chloride (AgCl)
    3 - multiply the decimal by 17.885 to yield the mass of chlorine
    4 - convert what you got for 3 to moles (divide by 35.5)
    5 - divide what you got for 4 by what you got for 1

    When I did this I got 6.62mol/dm3, but like I said, I'm not entirely sure. I still personally think that this is too complicated for a GCSE question
 
 
 
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