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ch 9, chem reactions


what is a chemical reaction? process by which the atoms of one or more substances are rearranged to form different substances
what is a reactant? the starting substance in a chemical reaction
what is a product? a substance formed during a chemical reaction
what is a chemical equation? statement using chemical formulas to describe the identities and relative amounts of the reactants and products involved in the chemical reaction
what is a coefficient? the # written in front of a reactant or product
what is the law of conservation of mass? amount of reactants equals amount of products. matter is neither created nor destroyed
what is a synthesis reaction? 2 or more substances react to give a single product (A + B -> AB)
what is a combustion reaction? oxygen combines with a substance to release energy and light (co2 and h2o in the product)
what is a decomposition reaction? a single compound breaks down into 2 or more compounds (AB -> A + B)
what is a single-replacement reaction? atoms of one element replace the atoms of another element in a compound (A + BX -> AX + B)
what is a double-replacement reaction? exchange of ions between 2 compounds. metals exchange places or nonmetals exchange places (AX + BY -> AY + BX)
what is a precipitate? a solid that is formed in a reaction
what is an aqueous solution? a substance dissolved in water
what is a solute? sold that dissolves in water
what is a solvent? liquid that dissolves in the solute
what is a complete ionic equation? equation shows all of the ions in solution
what is a net ionic equation? show only ions and product involved in the equation
what is a spectator ion? ions that do not participate in the reaction
what is a catalyst? substance that speeds up a reaction without being used up. it is written above the yield sign and it lowers the activation energy
Created by: klamp314