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Mixtures and Solutions

Describing the difference between a mixture and a solution and how we can separate both

Victoria King

on 2 February 2011

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Transcript of Mixtures and Solutions

Mixture or Solution? Seawater Water Salt Sand Rubbish Seaweed So is this a mixture or a solution? Solution = when a solid has dissolved in a liquid. The result is a see-through liquid like this Mixture = when the solid
doesn't dissolve in the liquid.
It ends up with 'bits' floating about (ew!)

Like this What about just saltwater?

This is a solution because the salt has dissolved in the water to make a clear liquid. A liquid that a solid dissolves in is called a solvent. e.g. in saltwater, the solvent is water. A solute is the solid that dissolves in the solvent. e.g. the salt in saltwater is the solute How do we separate mixtures? FILTER... this is good because we wouldn't want to drink this... But what about separating solutions?

This is not so simple...but we can do it! Evaporate the solvent (e.g. the water in salt water) What happened there? Revisiting Solvents

water isn't the only solvent

water cannot dissolve every solute, Sometimes we need a different solvent Acetone acts as a solvent in nail varnish remover. Water would not dissolve the varnish but acetone will. ?
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