a rose by anyother name?

Discussion in 'B&W: Film, Paper, Chemistry' started by ann, May 29, 2004.

  1. ann

    ann Subscriber

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    Copper chloride also indicates it is copper "cupric II) chloride.
    Is cupric sulphate also known as copper sulfate?
     
  2. Ole

    Ole Moderator Staff Member Moderator

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    Very simply, YES.

    The words "cupric" and "cuprous" denote the oxidation state of the copper, so anythong "cupric" is "copper(II)" as well. The nice blue crystals of copper sulfate are also known as cupric sulfate "CuSO4*5H2O", copper(II) sulfate pentahydrate, Kupfervitriol and several other names.

    I think it must be meant to be confusing - and I've got a degree in chemistry!
     
  3. ann

    ann Subscriber

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    thanks, that was my assumption, but then you know what they say about assuming!

    Then since i am not a chemists i would rather not "blow up the lab".
     
  4. ann

    ann Subscriber

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    ole;
    i would send you a pm but am lost with this new version of APUG.
    SInce you are a chemists what is the difference in Regant grade chemicals? I am looking to buy some iodine crystals and of course the photoformulary sells this as well as some one else. THere is a big difference in the price with the cheapest being regant grade. Is this a problem?
     
  5. Aggie

    Aggie Member

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    This is good Ann. Reagent grade is the purest form.
     
  6. Ole

    Ole Moderator Staff Member Moderator

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    For practically all photographic purposes buy the cheapest version. The only exception would be for making your own film emulsion, wher you need repeatability. Anything else, cheap is good. Reagent grade is at least 10 times purer than needed.