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    hey guys
    I'm struggling with my chemistry c/w

    my c/w is about making and analyzing crystals.

    I dissolved Iron (II)-7-hydrate and ammonium sulfate into minimum amount of hot water and add the solutions together, let them cool down and crystallized. it formed blue-green crystals but Im not sure what the chemical formula of the crystals is. I thought it was Mohr's salt but then realised that it has 7water after analysing the crystals with hydrate analysis.

    Can someone please help me with the chemical equation of the reaction between them and tell me what the chemical formula of the salt might be?

    many thanks!
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    Have a look at this: http://en.wikipedia.org/wiki/Iron%28II%29_sulfate
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    also this:

    Crystals.

    _Kar.
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    (Original post by Kareir)
    also this:

    Crystals.

    _Kar.


    thanks

    but I still dont know what I've made
    it looked like Mohr's salt, but I have no idea why it appears to have 7 waters and what the molecular formula is
    I tried to work out the equation but it isnt balanced.
    i thought it will be

    FeSO4.7H2O + (NH4)2SO4 -> (NH4)2Fe(SO4)2.7H2O

    but then it wont be Mohr's salt
    i m really confusedddd
    surely crystallization doesnt involve substitution or condensation or elimination?
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    (Original post by Reggiee)
    thanks

    but I still dont know what I've made
    it looked like Mohr's salt, but I have no idea why it appears to have 7 waters and what the molecular formula is
    I tried to work out the equation but it isnt balanced.
    i thought it will be

    FeSO4.7H2O + (NH4)2SO4 -> (NH4)2Fe(SO4)2.7H2O

    but then it wont be Mohr's salt
    i m really confusedddd
    surely crystallization doesnt involve substitution or condensation or elimination?
    The equation you give is different to what you originally said...
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    (Original post by soup)
    The equation you give is different to what you originally said...
    i know...
    thats why it doesnt make sense to me (coz thats only what I thought)
    or should i break it down into two equations
    like, FeSO4+H2O=? and (NH4)2SO4+H2O=?
    and then add the products of the two reactions together to form a equation for the actual salt made?
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    I knew people never bother reading links :rolleyes:

    _Kar.
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    (Original post by Kareir)
    I knew people never bother reading links :rolleyes:

    _Kar.
    hmmm I've read your link
    but my experiment has nth to deal with methamphetamine?
 
 
 
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