Chem test 1_Matter and Measurement.pdf

Amount present mass volume length properties of

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amount present ( mass, volume, length) Properties of substances - Physical properties: recognized without changing the substance to anything else - Colors - Hardness - Phase (solid, liquid, or gas) - Solubility - Odor - Density - Mass - Volume - Boiling/Melting points - Can it form a solution? - Conductivity - Chemical properties: describes how a substance reacts to form new substances: changes into new substances
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- Does it burn? - Does it react with water? - Does it react with acid? Changes of substances - Chemical change - Produces a new substance with different properties - Physical change - Change in appearance: no new substance produced Separating Mixtures - Separation with a magnet - Centrifuge - Instrument that spins very fast→ pushes most dense particles to bottom of tube, less dense stay up, least dense aree at the top - Chromatography: separates different molecules in a mixture by chromatography paper - Place the end of the paper in a solvent→ different molecules will move different distances up the paper→ separating the molecules in the mixture - Filtration: process that separates the solid and liquid parts of a mixture - Liquid goes through filter paper while solid stays -
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  • Fall '13
  • Intensive Properties

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