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Which ones dissolve in water?

Salt, marble and an oil-like liquid: solution, sediment or two layers?

Topic: First chemistry (grades 7–8)Grade: 7Free

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What you do

  1. Add salt to tube 1 and shake. Can you still see it?
  2. Add marble chips to tube 2. They sink and stay: they do not dissolve.
  3. Add hexane to tube 3: it floats as a separate layer, like oil on water.

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