Chemical Reaction

Front 1

chemical reaction

Back 1

process by which substances change to produce new substances w/ new chemical/physical properties

Front 2

precipitate

Back 2

solid that is produced as a result to a chemical reaction in solution

Front 3

What are the signs of a chemical reaction?

Back 3

-precipitate formed
-gas formation
-color/odor change
-energy change [(gained/lost) light, thermal, electricity]

Front 4

chemical bond

Back 4

force that holds two atoms in a molecule

Front 5

How do new substances form in a chemical reaction?

Back 5

-bonds are broken
-atoms are rearranged
-new bonds are formed

Front 6

chemical formula

Back 6

a combination of chemical symbols and numbers to represent a substance

Front 7

subscript

Back 7

number put below and to the right of a symbol

Front 8

What are the prefixes used in chemical names?

Back 8

1 - mono
2 - di
3 - tri
4 - tetra
5 - penta
6 - hexa
7 - hepta
8 - octa
9 - nona
10 - deca

Front 9

chemical equation

Back 9

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

Front 10

reactants

Back 10

starting materials in a chemcial reaction

Front 11

products

Back 11

substances formed from a chemical reaction

Front 12

law of conservation of mass

Back 12

law that states that mass can not be created or destroyed in ordinary chemical/physical changes

Front 13

coefficient

Back 13

number placed in front of a chemical symbol or formula

Front 14

With what kind of molecule do you add prefixes to the first word?

Back 14

covalent compounds

Front 15

synthesis reaction

Back 15

a chemical reaction in which 2 or more substances combine to form a new coumpound

Front 16

decomposition reaction

Back 16

a chemical reaction in which a single compund is broken down to form 2 or more simpler substances

Front 17

single-displacement reaction

Back 17

a chemical reactionin which one element replaces another element in a compound

Front 18

double-displacement reaction

Back 18

a chemical reaction in which ions from 2 compounds exchange places

Front 19

Which element is displaced in a single-diplacement reaction?

Back 19

a less reactive element is displaced by a more reactive element in a compound

Front 20

exothermic reaction

Back 20

a chemical reaction in which energy is released

Front 21

endothermic reaction

Back 21

a chemical reaction in which energy is absorbed

Front 22

law of conservation of energy

Back 22

law that states energy cannot be created or destroyed

Front 23

In an exothermic reaction, where was the energy released originally stored?

Back 23

in the chemical bonds in the reactants

Front 24

In an endothermic reaction, where is the energy absorbed stored?

Back 24

in the chemical bonds in the products

Front 25

rate of a reaction

Back 25

speed at which new particles form

Front 26

activation energy

Back 26

the minimum amount of energy required to start a chemical reaction

Front 27

Examples of activation energy

Back 27

friction (and match), light, spark of electricity

Front 28

what are some factors affecting rates of reactions?

Back 28

-temperature (higher temps make particles accelerate and collide forcefully)
-concentration (high, more reactant particles in given volume)
-surface area (grinding to power increases amount of reactant being exposed to other reactant particles)
-inhibitor/catalyst

Front 29

When is the only time a reaction can take place?

Back 29

if the particles of reactants collide

Front 30

inhibitor

Back 30

a substance that slows down or stops a chemical reaction

Front 31

catalyst

Back 31

a substance that speeds up a chemical reaction wihtout being used up or changed