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15 Cards in this Set
- Front
- Back
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physical properties
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what can be observed with out changing the substance
ex: melting point luster |
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chemical properties
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the ability to change into another another substance
ex: Mg burns=MgO tarnishing rust |
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metallic properties
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- change shape
- conduct electricity and heat |
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properties of ionic compounds
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- ionic crystals
- high melting point - electrical conductivity *when disolved in water |
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evidence of chemical reactions
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- formation of a new substance
- changes in energy |
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What are the rate of chemical reactions controlled by?
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- surface area
- temperature - concentration - catalyst *increases rate by lowering activation energy inhibitors - decrease rate of reaction |
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combustion
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rapid reaction between oxygen and fuel
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fire triangle
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three things necessary to start a fire
- fuel - oxygen - heat |
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effects of solutes on solvents
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lower freezing poing
higher boiling point |
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science final
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maonday
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properties of acids
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- sour taste
- react with metals - react with carbonates - react with indicator(red) ex: HCl H2SO4 |
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properties of bases
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- bitter taste
- slippery feel - react with indicator(blue) ex: sodium hydroxide NaOH-lye ammonia NH3 calciumoxide CaO |
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hydrogen ions
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positively charged ions formed by a hydrogen atom that has lost an electron
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forms of pure caron
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- diamonds crystal strucure
- graphite layers-weak - fullerenes hollow sphere - nanotubes cylindrical |
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polymers in plastic
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large molecule made up of smaller molecules
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