chapter 2 chemical reactions

Question 1

chemical reactions

Answer 1

the process by which one or more substances change to produce one or more different substances.

Question 2

chemical reactions

Answer 2

the process by which one or more substances change to produce one or more different substances.

Question 3

precipitate

Answer 3

a solid that is produced as a result of a chemical reaction in solution.

Question 4

chemical formula

Answer 4

a combination of chemical symbols and numbers to represent a substance.

Question 5

chemical equation

Answer 5

a representation of a chemical reaction that uses symbols to show the relationship between the reactants and the products.

Question 6

reactant

Answer 6

a substance or molecule that participates in a chemical reaction.

Question 7

product

Answer 7

the substance that forms in a chemical reaction.

Question 8

law of conservation of mass

Answer 8

the law that states that mass cannot be created or destroyed in ordinary chemical and physical changes.

Question 9

synthesis reaction

Answer 9

a reaction in which two or more substances combine to form a new compound.

Question 10

precipitate

Answer 10

a solid that is produced as a result of a chemical reaction in solution.

Question 11

chemical formula

Answer 11

a combination of chemical symbols and numbers to represent a substance.

Question 12

chemical equation

Answer 12

a representation of a chemical reaction that uses symbols to show the relationship between the reactants and the products.

Question 13

reactant

Answer 13

a substance or molecule that participates in a chemical reaction.

Question 14

product

Answer 14

the substance that forms in a chemical reaction.

Question 15

law of conservation of mass

Answer 15

the law that states that mass cannot be created or destroyed in ordinary chemical and physical changes.

Question 16

synthesis reaction

Answer 16

a reaction in which two or more substances combine to form a new compound.

Question 17

decomposition reaction

Answer 17

a reaction in which a single compound breaks down to form two or more simpler substances.

Question 18

single-displacement reaction

Answer 18

a reaction in which one element or radical takes place of another element or radical in a compound.

Question 19

double- displacement reaction

Answer 19

a reaction in which a gas, a solid, precipitate, or a molecular compound forms from the exchange of ions between two compounds.

Question 20

exothermic reaction

Answer 20

a chemical reaction in which heat is released to the surroundings.

Question 21

endothermic reactions

Answer 21

a chemical reaction that requires heat

Question 22

law of conservation of energy

Answer 22

the law that states that energy can not be created or destroyed but can be changed from one form to another

Question 23

activation energy

Answer 23

the minimum amount of energy required to start a chemical reaction.

Question 24

inhibitor

Answer 24

a substance that slows down or stops a chemical reaction.

Question 25

catalyst

Answer 25

a substance that changes the rate of a chemical reaction with out being used up or changed very much.