Chapter 14: Reactions

Question 0

reactant

Answer 0

the starting substance or molecule in a chemical reaction

Question 1

Law of Conservation of Matter

Answer 1

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

Question 2

product

Answer 2

the substance that forms in a chemical reaction

Question 3

precipitate

Answer 3

solid forms as a result of a chemical reaction and leaves the solution

Question 4

endothermic

Answer 4

process where energy is absorbed

requires heat

Question 5

exothermic

Answer 5

process where heat is released

Question 6

decomposition reaction

Answer 6

a reaction in where a single compound breaks down to form two or more simpler substances
one compound-2 or more substances
AX-A+X

Question 7

double replacement reaction

Answer 7

a reaction in which a gas, a solid precipitate, or molecular compound forms from the exchange of ions between two compounds
two compounds-two different compounds
AX+BY-AY+BX

Question 8

single replacement reaction

Answer 8

a reaction in which one element takes the place of another element in a compound
an element and a compound-a different element and compound
A+BX-B+AX(cation replacement), or Y+BX-X+BY(anion replacement)

Question 9

synthesis reaction

Answer 9

a reaction in which two or more substances combine to form a new compound
A+X-AX

Question 10

combustion

Answer 10

substance+oxygen-oxides,light,heat

Question 11

indicators of reaction

Answer 11

change in state:
color 
fizzing
dissolving 
etc.

Question 12

chemical equation

Answer 12

uses chemical symbols and formulas as shortcuts to describe a chemical reaction

Question 13

NaCl(s)-
O2(g)-
H20(l)
NaCl(aq)

Answer 13

NaCl(s)- solid, table salt in a shaker
O2(g)- gas
H20(l)- liquid
NaCl(aq)- dissolved in water, salt dissolved in water

Question 14

in a chemical reaction,

Answer 14

atoms can be separated, joined, or rearranged

Question 15

How to balance an equation (4 steps)

Answer 15

1. make a list of the elements on the reactant side
2. make same list on the product side
3. count the number of atoms of each element on each side
4. multiply (x coefficient) to get the same number and kind of atoms on each side

Question 16

law of conservation of energy

Answer 16

states that the energy cannot be created or destroyed, but can change forms and can be transferred from one object to the other

Question 17

chemical reaction=

Answer 17

chemical change