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Solution vs Colloid naming convention

  1. Mar 4, 2014 #1
    I know about chemical and physical differences between Solution and Colloid, but I can't find anywhere what is the right naming convention for Colloid substances. Let me explain:

    For Solution we have:
    Solute dissolved in Solvent called a Solution.

    For Colloid we have:
    "1st substance" dispersed in "2nd substance" called a Colloid.

    So is there a proper chemical definition for 1st and 2nd substances?
    Definitely it can't be Solute and Solvent, since it is not a Solution.

    I ask because write now I have to write in my work:
    "Substance in which the dispersion happens" or "Substance Dispersed" every time, which is very cumbersome.

  2. jcsd
  3. Mar 6, 2014 #2
    It is rarely as clear cut as you make it out. Its most common that the solid phase (hint hint) is also in solution. So, distinguising between the chemical compounds based on the phase they are in is a bit problematical.
    colloid is both the solid suspended in the medium and the entire colloidal suspension. That is, the word has two meanings. IOW you could use it to mean the solid phase. To be clear call it the solid phase. Or call it the discrete phase. The (liquid) is called the medium, the solvent, or the continuous phase. (obviously if the discrete phase is not a solid, then don't call it that, LOL)
    The colloid should be called the colloidal suspension rather than shortening it as you have done. Since it might be unclear, you need the full monty.
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