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Published byKathleen Martin Modified over 9 years ago
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Chapter 1 Part 2 Matter
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Matter: Anything that has mass and takes up space. What do chemists do with matter? Why do chemists do that?
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States of Matter Link to Movie Changes in State
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Mixtures and Compounds Link to Mixture Separation Video Link to Electrolysis of Water Video
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Classification of Matter
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Properties of Matter Once a substance is shown to be pure, chemists study its physical and chemical properties. –What kind of studies? –Why do we do that? –Can we ever know a substance is pure?
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Properties of Matter Physical Properties: □ Can be observed without changing a substance into another substance. Boiling point, density, mass, volume, etc. Chemical Properties: □ Can only be observed when a substance is changed into another substance. Flammability, corrosiveness, reactivity with acid, etc.
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Properties of Matter Intensive Properties: □ Independent of the amount of the substance that is present. Density, boiling point, color, etc. Extensive Properties: □ Dependent upon the amount of the substance present. Mass, volume, energy, etc.
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Changes of Matter Physical Changes: □ Changes in matter that do not change the composition of a substance. Changes of state, temperature, volume, etc. Chemical Changes: □ Changes that result in new substances. Combustion, oxidation, decomposition, etc.
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Chemical Reactions In the course of a chemical reaction, the reacting substances are converted to new substances.
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Chemical Reactions Link to Na and K in water Link to Reactions of Oxygen
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Matter What is matter made of? Do you know that? Do you think that? Do you believe that?
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Matter Atoms are the building blocks of matter. Each element is made of the same kind of atom. A identity of an atom is defined by the number of protons in the nucleus. Atoms combine in specific whole numbers ratios to form a compound.
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Compounds Compounds can be broken down into more elemental particles.
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Separation of Mixtures
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Distillation: Separates homogeneous mixture on the basis of differences in boiling point.
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Filtration: Separates solid substances from liquids and solutions.
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Chromatography: Separates substances on the basis of differences in solubility in a solvent. Link to Chromatography Video
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