Science Song: Difference Between...

Yo,

Peace man,

Compound?

Or mixture.....

 

A mixture is formed

When two or more substances

Are physically mixed together.

 

A compound is formed

When two or more substances

Are chemically combined through a chemical reaction.

 

The components of a mixture can be separated

With relative ease, whereas

 

The components of a compound are almost impossible to separate

Without a chemical reaction.

 

A mixture involves the physical combination of substances.

The substances can be combined in any ratio to form the mixture,

And the individual substances retain their chemical properties.

 

A compound requires a chemical reaction

Between two or more substances

And the compound formed has different chemical properties

Compared to the individual substances

That were initially combined. Unlike mixtures,

Compounds can only be formed if the substances

Are combined in certain fixed ratios.

 

Mixtures are easy to separate

To their individual components through physical means

Such as evaporation,

Filtration,

Distillation,

Precipitation and

Chromatography.

 

Compounds cannot be broken down

To their individual elements through

Physical means. For example,

To form a mixture of iron fillings and sulfur powder,

Any ratio of iron to sulfur can be used to mix the two components.

 

However,

To form a compound,

Seven parts of iron fillings

Have to be

Heated with

Four parts of sulfur powder

To form

A compound called iron sulphide.

And to separate the iron from sulfur

In a mixture,

A magnet can be used to attract all the iron fillings,

Leaving only

The sulfur behind. The compound called iron sulphide

Cannot be

Separated using any physical means.