Midterm 1-5 Chem 212

Question 1

Consists of a combination of two or more substances

Answer 1

Mixture

Question 2

A mixture containing three components

Answer 2

Ternary

Question 3

Utilizes differences in physical properties (solubility, boiling point) for separating mixtures

Answer 3

Physical method

Question 4

Utilizes differences in chemical reactivity for separating mixtures

Answer 4

Chemical method

Question 5

Separate the solid from a liquid

Answer 5

Decant

Question 6

The liquid portion you decanted from the mixture

Answer 6

Supernatant

Question 7

The mixture is poured through a porous material, such as filter paper

Answer 7

Filtration

Question 8

Liquid portion passes through the filer paper

Answer 8

Filtrate

Question 9

Is performed using a filtering funnel, gravity draws the liquid through filter paper which is placed in the funnel

Answer 9

Gravity filtration

Question 10

Applied vacuum is used to draw the liquid through filer paper which is held in a Büchner funnel

Answer 10

Vacuum filtration

Question 11

The liquid component is removed while the solid component will remain in the container

Answer 11

Evaporation

Question 12

Separating two solids by adding a solvent in which only one solid component will dissolve

Answer 12

Extraction

Question 13

Any substance, as cloth paper, through which liquid or gas is passed to remove suspended impurities or to recover solids

Answer 13

Filter (verb)

Question 14

The composition of a compound is represented, very important and useful information

Answer 14

Chemical formula

Question 15

Indicates the actual number of atoms of each element in a molecule or formula unit of the compound

Answer 15

Molecular formula

Question 16

Indicates the simplest whole number ratio of the different atoms in the compound

Answer 16

Empirical formula

Question 17

A substance is created by mixing and reacting appropriate amounts of the constituent elements

Answer 17

Synthesis reaction

Question 18

Consists of only one kind of matter (element or compound)

Answer 18

Pure substance

Question 19

The composition of reaction products can often be verified by determining the reaction, it’s the mole of reactants that will combine in exact amounts to yield a given products

Answer 19

Stoichiometry

Question 20

The Stoichiometry of a reaction system can be examined

Answer 20

Mole ratio method

Question 21

Mixing aqueous solutions results in formation of an insoluble product

Answer 21

Precipitate

Question 22

The mass of product is plotted vs the miles of sodium sulfate in each reaction mixture

Answer 22

Stoichiometric point

Question 23

Substances produced by the reaction

Answer 23

Product

Question 24

The substances that undergo change in the reaction

Answer 24

Reactant

Question 25

Occurs when two substances are combined to form a new substance

Answer 25

Combination or synthesis

Question 26

Reaction occurs when one compound breaks down into two or more products
AB>A+B

Answer 26

Decomposition

Question 27

Reaction occurs when one element replaces another element in a compound to form a new compound
A+BC>AB+C

Answer 27

Single displacement

Question 28

Reaction elements in two different compounds switch places to form two new compounds
AB+CD>AC+BD

Answer 28

Double displacement

Question 29

Reaction releases heat to their surroundings

Answer 29

Exothermic

Question 30

Reaction absorbs heat from there surroundings

Answer 30

Endothermic

Question 31

The species that loses electrons

Answer 31

Oxidation

Question 32

The species that gains electrons

Answer 32

Reduction

Question 33

Since both oxidation and reduction occur in tandem the reaction is called

Answer 33

Redox reactions

Question 34

The ease with which a metal loses electrons

Answer 34

Activity