chem q8
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| three ways to identify a chem reaction | evolution of heat and lighgt, production of a gas, formation of a precipitate
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| synthesis | two or more substances combined to form a new compound
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| decompotion | a ginle compound undergoes a reaction that produes two or more simplier substances
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| single replacement | one element replaces a similar element in a compound
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| double replacement | the ions of two compounds excange places in an aqueous solution to form two new compounds
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| combustion | a substance combines with oxygen, releasgin al arge amount of energy in the form of light and heat
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| when hydrocarbson combust... | they form CO2 and H20
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| when metals combust they | form metallic oxides
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| metals + nonmetals --> | ionic compounds
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| metal oxides + CO2---> | metal carbonates
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| nonmetalic oxides +h20 --> | acids
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| metal oxides+h20---> | bases
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| *dr -- metallic carbonate | CO2 + metal oxide
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| *dr -- metallic chlroates | salt + 02
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| *dr -- ionic compounds | metal + nonmetal
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| *sr -- active metals | replace lessa ctive metals
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| *sr -- active metals replce hydogen in H20 to make | hydroxide (metal + OH) and hydrogen gas
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| *sr -- active metals replace hydrogen in acids | to make metallic salts (metal + anoin) and h20
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| *sr -- active nonemtals replace | less active nonemtals
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| *DDr precipitae often from | in thse reactions
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| precipitate: | a solid that is produced as a result of a chemical reaction in a solution and that separates from the solution
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| the formation of a precipitaste is determined by | a set of rules
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