Notices
Results 1 to 7 of 7

Thread: can any one help me with this?

  1. #1 can any one help me with this? 
    New Member
    Join Date
    Feb 2008
    Location
    singapore
    Posts
    4
    How could i seperate iron fillings, sulphur powder and potassium chloride without using lab apparatus?

    and does any one knows any fun facts about this three stuff?


    Reply With Quote  
     

  2.  

    Related Discussions:

     

  3. #2  
    Forum Ph.D.
    Join Date
    Feb 2005
    Location
    Dublin, Ireland
    Posts
    945
    if you take a little think im sure you can figure it out yourself.

    post a possible solution and i'll see if i can say its right or not.

    what do you know about the three things? and if you dont know anything, try to find out. And while trying to find out think about some general one thing you would normally think about when looking at chemical's


    Stumble on through life.
    Feel free to correct any false information, which unknown to me, may be included in my posts. (also - let this be a disclaimer)
    Reply With Quote  
     

  4. #3  
    Forum Professor leohopkins's Avatar
    Join Date
    Dec 2006
    Location
    Dulwich, London, England
    Posts
    1,418
    Okay, you can use a magnet to pick up the iron, then im not 100% sure on this but then pour water over the rest ?
    The hand of time rested on the half-hour mark, and all along that old front line of the English there came a whistling and a crying. The men of the first wave climbed up the parapets, in tumult, darkness, and the presence of death, and having done with all pleasant things, advanced across No Man's Land to begin the Battle of the Somme. - Poet John Masefield.

    www.leohopkins.com
    Reply With Quote  
     

  5. #4  
    Forum Ph.D.
    Join Date
    Feb 2005
    Location
    Dublin, Ireland
    Posts
    945
    Thats a possible way, what they are looking for is probably an experiment to show the difference in properties of many differnet elements and compounds, and is so simple to do , it can be done at home.

    hopefully woshiooqi will be able to describe it, and understand why - mainly why water is useful.

    im sure it would have been best if he got it himself.
    Stumble on through life.
    Feel free to correct any false information, which unknown to me, may be included in my posts. (also - let this be a disclaimer)
    Reply With Quote  
     

  6. #5  
    New Member
    Join Date
    Feb 2008
    Location
    singapore
    Posts
    4
    i have thoughtof using magnet too, but i am afraid that the sulphur powder will be stick to the magnet. Also, if i add water to the sulphur powder and potassium chloride, how do i filter it, i cannot use filter paper. if i use paper or tissue, sulphur powder will stuck on to the paper
    Reply With Quote  
     

  7. #6  
    Forum Isotope Bunbury's Avatar
    Join Date
    Sep 2007
    Location
    Colorado
    Posts
    2,590
    The density of sulfur powder being greater than the potassium chloride solution, could you allow the solids to settle and then decant the solution? If you repeated the washing a couple of times you'd get most of the KCl.
    Reply With Quote  
     

  8. #7  
    Forum Ph.D.
    Join Date
    Feb 2005
    Location
    Dublin, Ireland
    Posts
    945
    If this is true (that you had the bones of the answer's given) then you have a very good answer in my book, i would give you a good mark for it(but im not your teacher). At least as long as you describe it well. (To be honest hardly anyone but chemists would be separating chemicals at home, so the tools would be there. i think what you really want is the principles right - and it can be done using house hold things)

    The sulphur should not stick to the magnet.

    If you were to get a sauce pan, and heat some water, the KCl should dissolve, simply filter the sulphur off (should be easy enough done using a fine strainer) and then allow the water to either boil off leaving behind the salt in the pan, or even cool it down normally but only if you have lots and can afford to saturate the solution, and crystals should form.

    Similarly if you leave the salt solution on a window with a hot sun shining, it should simply evaporate off.

    As for the problem of sticking to anything you use, if it’s dried (oven) sufficiently, it should not stick at all.
    Stumble on through life.
    Feel free to correct any false information, which unknown to me, may be included in my posts. (also - let this be a disclaimer)
    Reply With Quote  
     

Bookmarks
Bookmarks
Posting Permissions
  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •