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MIXING DRINKS

Learn why some liquids do not mix with each other

Suitable For

Grade 5

Difficulty

3

Time Required

 <12 Hours

Supervision

Advised

What’s it about?

Not all liquids can be mixed together to form one new liquid substance. If more than one liquid cannot be mixed together it is called ‘immiscible’ liquids. In this science experiment we will investigate the strange behaviour of some of these ‘immiscible’ liquids:

Topics covered

Immiscible liquids, Emulsifier

What will I need?

  • FOOD COLOURING
  • TAP WATER
  • RUBBING ALCOHOL
  • COOKING OIL
  • DISHWASHING LIQUID
  • 2x GLASS JARS

Procedure (Method)

Unfortunately, this section is only available in the e-book version of the project.

How does it work?

Unfortunately, this section is only available in the e-book version of the project.

This science experiment works because the three ‘immiscible’ liquids: water, oil and alcohol have very different molecular densities. The heaviest liquid is water and forms the bottom layer, followed by oil, and alcohol forms the top layer in the jar. Shaking the jar will temporarily mix the liquids, but they eventually arrange themselves as before.

When an ‘emulsifier’, such as dishwashing liquid, is added to these liquids, they can combine with each other. The soap molecules surround the droplets of oil and alcohol to prevent them from combining with each other again. This allows the water to mix with these liquids.

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Why not check out the full worksheet in one of our popular e-books?

This particular science project can be found in any of the following Experiland e-books:

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A project introduction and background, complete listing of required materials, step-by-step instructions on how to carry out the project, why it works, learn more section, as well as a science glossary with all the relevant terms make up each of the all-inclusive science project worksheets in our e-books!

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