Mixtures Mr. Skirbst Physical Science Topic 11. 4 Classes of Matter.

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Presentation transcript:

Mixtures Mr. Skirbst Physical Science Topic 11

4 Classes of Matter

1. Mixtures 2. Solutions 3. Elements 4. Compounds

Mixtures A combination of two or more substances mixed together but not chemically combined

Properties of Mixtures Substances keep identity No new substances formed No fixed proportions Can be physically separated

2 Types of Mixtures 1.Heterogeneous - different throughout - least mixed mixture (ex. Tossed salad)

2 Types of Mixtures 2.Homogeneous - same throughout - well-mixed mixture (ex. milk)

Homogeneous Mixtures Colloid - particles are mixed, but not dissolved Solution - particles are dissolved

Solutions Homogeneous mixture formed when one substance dissolves in another

Solutions Solute – substance that IS dissolved Solvent – substance that DOES the dissolving Solubility – substance’s ABILITY to dissolve

Lab Techniques Decanting– separating liquids + solids by pouring off liquid Filtering– separating liquids + solids by passing through a filter (semi-permeable membrane)

Lab Techniques