Chemistry Lab Final Terms

Front 1

Molarity

Back 1

Expressed as the number of moles of solute per liter of solution

Front 2

Molality

Back 2

Number of moles of solute per 1,000 grams of solvent

Front 3

% (m/m)

Back 3

mass over total mass times 100

Front 4

Volumetric Unit

Back 4

value determined by volume

Front 5

Gravimeteric Unit

Back 5

value is set by mass

Front 6

Titration

Back 6

Delivery from burette of a measured volume of a solution of unknown concentration (titration) into a solution containing substance being analyzed.

Front 7

End Point

Back 7

No more titration should be added, color change occurs.

Front 8

Equivalence Point

Back 8

Theoretical point in a titration which both reactants and products are consumed.

Front 9

Redix Reaction

Back 9

Chemical reaction that involves reduction and oxidation. It also involves oxidation numbers of atoms including in reaction.

Front 10

Calorimetry

Back 10

measure of heat flow into or out of a system

Front 11

Specific Heat Capcity

Back 11

Amount of heat (in joules) required to raise the temperature of one gram of the substance by 1 degree Celsius.

Front 12

Molar Heat Capacity

Back 12

Amount of heat energy required to raise temperature of 1 mole of a substance by 1 degree Celsius

Front 13

Dulong and Petit's Law

Back 13

metals have Molar heat capacity of about 24.9 J/mol C

Front 14

Hess's Law

Back 14

Enthalpy change of a reaction is independent of the route taken.

Front 15

First Law of Thermodynamics

Back 15

Energy cannot be created nor destroyed

Front 16

Neutralization Reaction

Back 16

Acid + Base interact with the formation of a salt (Acid-Base reaction)

Front 17

Heat of Neutralization

Back 17

Enthalpy change occurs when one equivalent of an acid and one equivalent of a base undergo neutralization

Front 18

Heat of Solution

Back 18

One mole of a substance dissolves completely in a large volume of solvent

Front 19

Colligative Properties

Back 19

Properties of matter that depend on the # of particles, molecules and ions rather than the chemical identity of any one particle

Front 20

Chemical Kinetics

Back 20

Determination and study of rates of reactions

Front 21

Rate of Reaction

Back 21

Expressed in terms of decrease of any one of the reactants with respect to time or increase of one of the products with respect to time

Front 22

Rate Law

Back 22

Algebraic expression that relates rate to the concentrations of the reactions

Front 23

Method of Intial Rates

Back 23

Measuring the rate of reaction at very short time before any significant changes in concentration occur

Front 24

Spectroscopy

Back 24

Studies the interaction of light with matter

Front 25

Absorbance

Back 25

logarithmic measure of the amount of light absorbed (particlar wavelenght) as the light passes through a sample or substance

Front 26

Transmittance

Back 26

Ratio of radiant power transmitted by object to incident radiant power

Front 27

Equilibria

Back 27

Condition existing when a chemical reaction and its reverse reaction take place at equal rates

Front 28

Exothermic Reaction

Back 28

a chemical reaction accompanied by the evolution of heat flows out of the system

Front 29

Endothermic Reaction

Back 29

a chemical reaction accompanied by the absorption of heat

Front 30

Le Chatelier's Principle

Back 30

Constraint is applied to a system in equilibrium; the system adjusts a new equilibrium that tends to counteract the constraint

Front 31

Bronsted-Lowry Acid

Back 31

Proton donor

Front 32

Bronsted-Lowry Base

Back 32

Proton acceptor

Front 33

pH

Back 33

measure of acidity

Front 34

pH meter

Back 34

device used to measure pH

Front 35

Buffer

Back 35

Is a solution containing either a weak acid and its salt, or a weak base and its salt, which is resistant to changes in pH