MIXTURES

this unit helps understand how mixtures are done and separated from one another

Mixture

A mixture is when two or more different substance are mixed together e.g. when we mix sand and cement we get concrete blocks

Dissolving substance/ solutes.

These are substances that dissolve when put in water/ any liquid after stirring.

So, solutes are soluble in water or the liquid

Examples of solutes.

– Sugar

– Salt

– milk powder

Insoluble substances.

Substances which don’t completely dissolve in any liquid or water.

e.g. sand, maize flour, stones etc

A suspension: is a substance where the solute does not completely dissolve in

the solvent.

Solvent.

Is a substance in which a solute dissolves.

Examples.

  • water
  • petrol
  • methylated spirit

Nb: Water is universal solvent because it dissolves almost all solutes.

solution.

Is a uniform mixture of a solute and solvent.

A VIDEO ILLUSTRATING SOLUTION

saturated solution is a solution which dissolves more solutes after heating it.

Super saturated solution is a solution which cannot dissolve any more solute even offer heating it.

SEPARATION OF MIXTURES.

  1. Filtration.

It is a process of separating solid particles from a liquid using a filter.

The solid particles that remain in the filter are called residues.

The liquid that passes through is called a filtrate.

filtrate

How filtration method can be applied in our homes.

  1. When separating passion, orange, etc fruit juice from the seeds.
  2. When separating clear water from muddy water.
  1. Decantation.

It is when solids particles are allowed to settle at the bottom of a liquid then a liquid is carefully poured off to separate it from the solid particles.

decantation

 

The solid particles that remain in the one container is called a residue.

The liquid that is collected in another container is called a decantee.

 

How decantation method can be applied in our homes.

  1. When separating passion, orange, etc fruit juice from the seeds.
  1. When separating clear water from muddy water.

For the medicine to mix with the liquid that has settled at the top.

 3. Distillation.

It is the making of dirty water pure by evaporation and condensation.

Nb: Distilled water is not good for drinking because it lacks mineral salts.

The substance that remains in the container is called a residue.

The substance that is collected in the second container is called a distillate.

Distilled water is used to mix drugs in hospitals.

distillation

SEPARATION OF MIXTURES OF SOLIDS.

  1. Floatation.

It is a method of separation of mixtures where one sinks and the other floats.

  1. Using magnets to separate metallic objects from non metallic objects.
  2. Hand picking / sorting.

Attachments3

ASSIGNMENT : MIXTURES P.5 assignment MARKS : 10  DURATION : 1 week, 3 days

SEE ALLAdd a note
YOU
Add your Comment
 

DOWNLOAD YAAKA DN APP









X