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Homework Help: Separation of Mixture Lab

  1. Feb 25, 2017 #1
    1. The problem statement, all variables and given/known data

    In this lab we are going to be given a mixture containing sodium chloride [NaCl], silicon dioxide [SiO2], Iron filings [Fe], and calcium carbonate [CaCO3]
    The goal of the lab is to use separation and measurement techniques to determine the percent by mass of each specie in the original sample

    2. Relevant equations

    The lab book gives a list of methods of separation that I suppose are what we should resort to using in the lab
    These methods are Filtration, Evaporation, Chromatography, Distillation, Centrifugation, and Sedimentation
    In addition
    NaCl is the only soluble compound
    Fe is the only magnetic substance
    CaCO3 exclusively reacts with HCl
    CaCO3 + 2HCl -> CaCl2 + CO2 + H2O
    I am not sure if we will be given HCl or a magnet though

    3. The attempt at a solution

    Since the NaCl is the only soluble compound we can dissolve it in water, remove the other precipitants, and evaporate the water to determine its mass
    I don't know if HCl or magnets will be provided or allowed for use but I think they can be used to determine the amount of CaCO3 and Fe respectively
    I just have a feeling that the methods in the lab book listed above are the ones that we are supposed to use so is there any easier and more precise method to separate the species?
  2. jcsd
  3. Feb 25, 2017 #2


    User Avatar

    Staff: Mentor

    You are on the right track.
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