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science q8

chem q8

three ways to identify a chem reaction evolution of heat and lighgt, production of a gas, formation of a precipitate
synthesis two or more substances combined to form a new compound
decompotion a ginle compound undergoes a reaction that produes two or more simplier substances
single replacement one element replaces a similar element in a compound
double replacement the ions of two compounds excange places in an aqueous solution to form two new compounds
combustion a substance combines with oxygen, releasgin al arge amount of energy in the form of light and heat
when hydrocarbson combust... they form CO2 and H20
when metals combust they form metallic oxides
metals + nonmetals --> ionic compounds
metal oxides + CO2---> metal carbonates
nonmetalic oxides +h20 --> acids
metal oxides+h20---> bases
*dr -- metallic carbonate CO2 + metal oxide
*dr -- metallic chlroates salt + 02
*dr -- ionic compounds metal + nonmetal
*sr -- active metals replace lessa ctive metals
*sr -- active metals replce hydogen in H20 to make hydroxide (metal + OH) and hydrogen gas
*sr -- active metals replace hydrogen in acids to make metallic salts (metal + anoin) and h20
*sr -- active nonemtals replace less active nonemtals
*DDr precipitae often from in thse reactions
precipitate: a solid that is produced as a result of a chemical reaction in a solution and that separates from the solution
the formation of a precipitaste is determined by a set of rules
Created by: lilee256