PURE SUBTANCES AND MIXTURES. ●HETEROGENOUS MIXTURES ●HOMOGENEOUS MIXTURES. PURE SUBSTANCES AND MIXTURES. Some substances are pure and others are mixtures. Pure substances have got only one component, but mixtures contain two or more components. PURE SUBTANCES.
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Some substances are pure and others are mixtures.
Pure substances have got only one component, but mixtures contain two or more components.
A puresubtanceconsists of onlyone component.It has got specific properties that we can describe
gold water oxigen
We can identifythembyspecificpropertiessuch as densityortheboilingpoint.
Is a combination of two or more components.The properties depend on its components and how they are combined.
Most things around us are mixtures of different substances.
Granite is a mixture of different minerals. Granite's a very hard stone. It's hard because it formed as hot liquid stone, and so the molecules inside it are all jumbled , instead of lying in layers as in sedimentary rocks like limestone or slate.
Air is a mixture o nitrogen,oxygen,carbon dioxide and other gases.Water covers the Earth in a layer over 400 miles high. This layer is called the atmosphere. It contains 78% nitrogen, 21% oxygen, and smaller amounts of hydrogen, carbon dioxide, and others.
We can see the separate components of a heterogeneous mixture.
We can easily see the individual pieces of fruit in a salad.
What is a mixture?
A mixture is a combination of two or more components.
What is a pure subtance?
A pure subtance is only one component that we can describe.
Say two examples of mixtures.
For example tea or juice.
Say two examples of pures subtances.
For example gold and water.