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Latest Discussions

  • 1 Reply
    Ulex writes

    As you might anticipate, the elucidation of the biosynthesis of Tyrian Purple is a work in progress rather than well established fact. I am not an expert on biosynthesis but I was able to find a source of information which will give you an idea of how far the work has gone.
    The website I am about to recommend to you is in the nature of an on-line boo...
  • 4 Replies
    Ulex adds to the confusion !

    My vote goes to magnesium sulphate because when subjected to a standard flame test it is the only one of the four not to give a characteristic flame colour. Having said this, the answer expected is surely calcium sulphate on solubility grounds.
  • 4 Replies
    Victor (from Dr ChemNet) writes:

    I agree with Igloo - the relative insolubility of calcium sulphate and the lack of a hydrated crystal form of potassium sulphate seem to be the most likely contenders. I would err on the side of calcium sulphate insolubility, though: the solubility is 0.21 g/100 mL of water(*) (compare for potassium sulphate 12.0, magn...

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