Chemical Reactions

Question 1

Chemical reaction

Answer 1

The process when one or more substanc is changed into new substances

Question 2

Reactants

Answer 2

In a chemical reaction, the substance that r acts

Question 3

Products

Answer 3

In a chemical, the new substance that is formed

Question 4

Chemical equation

Answer 4

Shorthand method used to describe chemical reactions using chemical formulas and other symbols

Question 5

Coefficient

Answer 5

The before number in a chemical equation that represents the number of units of each substance taking part in a chemical reaction

Question 6

Balanced chemical equation

Answer 6

Chemical equation with the same number of atoms on each side of the equation

Question 7

Mole

Answer 7

SI (international Standard Unit for quantity equal to 6.02 x 10^23 units of that substance

Question 8

Mole mass

Answer 8

The mass in grams of one mole of substance

Question 9

Combustion reation

Answer 9

A type of chemical reaction that occurs when a substance reacts with oxygen to produce energy in firm of heat and light

Question 10

Synthesis reaction

Answer 10

Chemical reaction in which two or more substances combine to form a different substance
A +B = AB

Question 11

Decomposition reaction

Answer 11

A chemical reaction in which one substance breaks down into two or more substances

Question 12

Single displacement reaction

Answer 12

Chemical reaction in which one element replaces another element in a compound

AB + C =AC + B

Question 13

Double displacement reaction

Answer 13

Reaction in which two ionic compounds in solution are combined, can produce precipitate, water, or gas

Question 14

Precipitate

Answer 14

Insoluble compound that is formed in a solution during double displacement (a solid)

Question 15

Oxidation

Answer 15

Oxidation is the loss of electrons from the atoms of a substance in a chemical reaction

Question 16

Reduction

Answer 16

The gain of electrons by the atoms of a substance in a chemical reaction

Question 17

Reaction rate

Answer 17

The rate at which reactants change into products in a chemical reaction

Question 18

Collision model

Answer 18

Explains why certain factors affect reaction rates, states that particles must collide in order to react

Question 19

Catalyst

Answer 19

Substance that speeds up a chemical reaction without being permanently changed itself

Question 20

Inhibitor

Answer 20

Substance that slows down a chemical reaction

Question 21

Reversible reaction

Answer 21

A reaction that can occur in forward or reverse directions

Question 22

Equilibrium

Answer 22

State in which forward and reverse reactions, or processes, proceed at equal rates

Reactants ——> products
<——

Question 23

Le Ch atelirs principle

Answer 23

If a stress is applied to a state at equilibrium, the equilibrium shifts I’m the direction opposite of the stress

Question 24

Exothermic reaction

Answer 24

Release energy

Question 25

Endothermic

Answer 25

Absorb heat

Question 26

Solvent

Answer 26

dissolves

Question 27

Solute

Answer 27

A substance that dissolves in a substance

Question 28

Electrolyte

Answer 28

Produces energy