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SOLUTIONS AND MECHANICAL MIXTURES. The Particle Theory 1.All matter is composed of tiny particles.  Size and shape vary.  All particles of pure substance.

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Presentation on theme: "SOLUTIONS AND MECHANICAL MIXTURES. The Particle Theory 1.All matter is composed of tiny particles.  Size and shape vary.  All particles of pure substance."— Presentation transcript:

1 SOLUTIONS AND MECHANICAL MIXTURES

2 The Particle Theory 1.All matter is composed of tiny particles.  Size and shape vary.  All particles of pure substance are exactly the same size. 2.All particles of one substance are the same  Salt particles are different from pepper particles

3 The Particle Theory 3.There are spaces between particles. 4.Particles are always moving – the more energy they have, the faster they move.  temp the faster the particles move 5.There are forces of attraction between particles.

4 The Particle Theory Matter has particles M oving particles A ttraction between particles S ame particles throughout S paces between particles M 2 ASS Energy is transferred between particles by moving particles hitting each other and either speeding up or slowing down.

5 Classification of Matter matter mixturespure substances mechanical mixture (heterogeneous) solutions (homogeneous) Matter can exist in 3 states: Any substance or material that has mass and occupies space. solid, liquid and gas

6 Matter Solid Particles are close together and locked together into a pattern. Attractive forces are very strong. Particles move, but only vibrate in one place.

7 Matter Liquid Particles are slightly farther apart Attractive forces are weaker Particles are able to slide past one another

8 Matter Gas Particles are far apart. Attractive forces are weakest. Particles are able to move in any direction.

9 Pure Substances Contain only one kind of particle. All samples have same properties (big or small). Only a few are found in nature (raw material). e.g.diamond, sugar, aluminum foil

10 Contain 2 or more pure substances. Any combination of solids, liquids and gases. Almost all natural substances are mixtures of pure substances. e.g. pop – mixture of liquid water, solid sugar, and CO 2 Mixtures

11 Mixtures solution (homogeneous) pure substance mechanical mixture (heterogeneous)

12 Mixtures Homogeneous (“same kind”) A solution Particles of 2 or more pure substances mix completely Feel and look like one substance Properties of sample always the same e.g. salt and water steel (iron, O 2 and C)

13 Mixtures Heterogeneous (“different kinds”) A mechanical mixture. 2 or more substances can be seen or felt. Each sample will have different properties. e.g. granola, concrete


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