DAT Gen Chem Solutions

Question 1

has less than the maximum amount of solute
dissolved in a solvent.

Answer 1

unsaturated soln

Question 2

maximum amount of
solute dissolved in a solvent.

Answer 2

saturated soln

Question 3

contain even more dissolved solute than
they can normally hold at a given temperature
and pressure.

Answer 3

supersaturated soln

Question 4

when a dissolved solute
comes out of the solution.

Answer 4

crystalization

Question 5

These crystals are
generally formed by

Answer 5

manipulating temp or pressure

Question 6

Group 1 metal cations, what kind of salt

Answer 6

soluble salt

Question 7

Ag+, what kind of salt

Answer 7

insoluble salt

Question 8

No3- what kind of salt

Answer 8

soluable

Question 9

ClO4- what kind of salt

Answer 9

solable

Question 10

C2H3O2- what kind of salt

Answer 10

soluble

Question 11

NH4+, what kind of salt

Answer 11

soluble

Question 12

Pb2+, Hg2+ what kinda salt

Answer 12

insoluble

Question 13

Oh- what kinda salt

Answer 13

insoluble

Question 14

S2- what kinda salt

Answer 14

insoluble

Question 15

CO3 2-, PO4 2-

Answer 15

insoluble

Question 16

soluble component generally

Answer 16

trumps insoluble component

Question 17

HCl, HBr, HI, HClO4, HClO3,
H2SO4, HNO3.

Answer 17

strong acids

Question 18

Group I Metal Hydroxides,
Ca(OH)2, Sr(OH)2, Ba(OH)2.

Answer 18

strong bases

Question 19

HF, HCN, CH3COOH, etc.

Answer 19

weak acids

Question 20

NH3, CH3NH2, etc.

Answer 20

weak bases

Question 21

Solids are more soluble at what temps

Answer 21

higher

Question 22

Gases are more soluble at what temps

Answer 22

lower

Question 23

Gases are more soluble at what pressures

Answer 23

higher

Question 24

For solids in liquids, an “blank” in tempting solubilty

Answer 24

incresae

Question 25

method that measures how much a chemical substance absorbs light by measuring the intensity of light as a beam of light passes through a sample solution.

Answer 25

spectrophotometry

Question 26

following formula illustrates Beer’s law: (absorbance)

Answer 26

absorbance = molar absorptivity x path length x conc of soln

Question 27

unit for molar absorptivity

Answer 27

M-1*cm-1

Question 28

are the attractive and repulsive forces between separate molecules.

Answer 28

intermolecular forces

Question 29

arise from the temporary attraction between adjacent atoms or molecules.

Answer 29

LDF

Question 30

dilution formula

Answer 30

m1v1=m2v2

Question 31

concentration in terms of the equivalents of one chemical species that reacts stoichiometrically with another chemical species.

Answer 31

normality (N)

Question 32

Normality eqn

Answer 32

N=number of equivalents x molarity

Question 33

ratio of the number of moles of one component of a mixture to the total number of moles.

Answer 33

mole fraction (X)

Question 34

mole fraction of solute =

Answer 34

moles of solute/total moles in soln

Question 35

depend upon the concentration of solute molecules or ions, but not upon the identity of the solute itself.

Answer 35

colligative properties

Question 36

depend on the identity of the dissolved species and solvent.

Answer 36

noncolligative properties

Question 37

property of a liquid that allows it to resist an external force due to the cohesive nature of its molecules.

Answer 37

surface tension

Question 38

is surface tension colligative or non colligative

Answer 38

non colligative

Question 39

the attractive forces between molecules of the same substance,

Answer 39

cohesive

Question 40

attractive forces between molecules of different substances.

Answer 40

adhesive forces

Question 41

measure of a fluid’s resistance to flow.

Answer 41

viscocity

Question 42

is viscosity a colligative or non colligative property

Answer 42

non colligative

Question 43

are color and density colligative or non colligative

Answer 43

non colligativeis

Question 44

is solubility colligative or non colligative

Answer 44

non colligative

Question 45

which is the point where the vapor pressure equals the atmospheric pressure.

Answer 45

boiling pti

Question 46

is boiling pt colligative or non colligative

Answer 46

colligative

Question 47

as vapor pressure increases, boiling point....

Answer 47

decreases

Question 48

The vapor pressure of a pure solvent is... than the vapor pressure of a solution containing non-volatile solutes.

Answer 48

greater than

Question 49

calculate the new vapor pressure after a solute has been added, use Raoult’s law:

Answer 49

VP of soln after solute has been added = mole fraction x pure VP

Question 50

change in boiling point temperature can be calculated using the following formula:

Answer 50

change in temp = solvents BP elev constant x solute vant hoff factor x molality

Question 51

The change in freezing point temperature can be calculated using the following formula:

Answer 51

change in temp = - FP depression constant x vant hoff factor x molality

Question 52

The osmotic pressure can be calculated using the following formula:

Answer 52

osmotic pressure = vant hoff factor x molarity x universal gas constant x temp (K)