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Ch 9 and 10 science
na
19
Science
8th Grade
06/03/2009

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Cards

Term
chemical reaction
Definition
the process by which one or more substances change to produce one or more differnt substance
Term
precipitate
Definition
a solid that is producedn as a result of a chemical reaction in solution
Term
exothermic reaction
Definition
a chemical reaction in which heat is released in to the surrounding
Term
endothermic reaction
Definition
a chemical reaction that requires heat
Term
law of coservation of energy
Definition
the law that states that energy cannot be created or destroyed but can be changed from one form to another
Term
chemical formula
Definition
a combination of chemical symbol and numbers to represent a substance
Term
chemical equation
Definition
a representation of a chemical reaction that uses the sybols to show the relationship between the reactants and the products
Term
reactant
Definition
a substance or molecule that participates in a chemicl reaction
Term
product
Definition
a substance that forms in a chemical reaction
Term
law of coservation of mass
Definition
the law that states that mass cannot be created or destroyed in ordinary chemical and physical changes
Term
ionic compounds
Definition
a compound made oppositely charged ions
Term
chemical bond
Definition
an interaction that holds atoms or ions together
Term
covalent compound
Definition
a chemical compound that is formed by the sharing of electrons
Term
acid
Definition
any compound that increases the number of hydronium ions when dissolved in water
Term
indicator
Definition
a compound that can reversibly change color depending on conditions such as pH
Term
base
Definition
any compound that in creases the number of hydroxide ions when dissolved in water
Term
neutralization reaction
Definition
the reaction of an acid and a base to form a neutral solution of water and a salt
Term
pH
Definition
a value that is used to express the scidity or basicity of a system
Term
salt
Definition
an ionic compound that forms when a metal atom replaces the hydrogen of an acid
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