Yin asked in 科學及數學化學 · 8 years ago

sodium chloride filtration~唔該!

sodium chloride filtration method係點架?

我淨係記得d...total 4個point~

1.pour the sea water in the...





4 Answers

  • 8 years ago
    Favorite Answer

    one can obtain sodium chloride from sea water by filtration, AFTER performing crystallization.

    1. pour the sea water into a beaker

    2. slowly and gently heat the sea water, allowing water to evaporate

    3. when solid is seen at the bottom of the beaker, filter the liquid (by pouring the content of beaker into a funnel with filter paper)

    4. (wash,) dry the solid (of sodium chloride)

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    2011-12-06 16:39:45 補充:


    one need not to evaporate the sea water to dryness in order to obtain sodium chloride.

    a (re)crystallization will do.

    c.f. commercial production of sea salt

    2011-12-06 16:41:59 補充:

    sodium ion and chloride ion have highest concentration in sea water, so it's safe to assume that mainly sodium chloride is produced in crystallization.

    well, if you do not assume this, how can one (readily) separate ions from the bulk?

  • 8 years ago

    Filtration of for separating insoluble solid from mixture.

    sodium chloride is soluble solid

    filtration is not suitable!

    Source(s): me
  • 8 years ago

    Filtration cannot separate sodium chloride from sea water.

    2011-12-06 16:20:00 補充:


    Sea water contains different types of salts. How do you make sure that the salt collected after crystallization must be sodium chloride?

  • 8 years ago



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