Mixtures and Pure Substances. Pure Substance Pure Substance: a substance that contains only one type of material –Element- substance that contains only.

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Presentation transcript:

Mixtures and Pure Substances

Pure Substance Pure Substance: a substance that contains only one type of material –Element- substance that contains only one type of atom. It is the simplest form of matter that has a unique set of properties –Compound- a substance that contains two or more elements chemically combined in a fixed proportion Compounds can be broken down into simpler substances by chemical means, but elements can not

Sodium Na Chlorine Cl 2 Sodium Chloride (salt) NaCl Element Compound + =

Mixtures Mixture: matter that contains two or more different materials –Heterogeneous Mixture- a mixture in which the composition is not uniform throughout –Homogeneous Mixture(solution)- a mixture in which the composition is uniform throughout Solute- substance being dissolved Solvent- substance doing the dissolving –A solution can be in the solid, liquid or gas phase

What would you consider this?

And this?

Extensive vs. Intensive Properties Extensive Property –A property that depends on the amount of matter present Intensive Property- a property that DOES NOT depend on the amount of matter present

Intensive vs. Extensive Properties Intensive Property: a property that does NOT depend on the amount of matter present Extensive Property: a property that depends on the amount of matter present

Mass

PhysicalExtensive

Conductivity

PhysicalIntensive

Flammability

ChemicalIntensive

Color

PhysicalIntensive

Density

PhysicalIntensive

Heat produced

ChemicalExtensive

Volume

PhysicalExtensive

Melting Point

PhysicalIntensive

Boiling Point

PhysicalIntensive

Length

PhysicalExtensive

Examples Physical: Mass Conductivity Color Density Volume Melting Point Boiling Point Length Chemical Flammability Heat Produced

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