Exam 1 pre

Question 1

creating a solution with water _______ the properties

Answer 1

changes

Question 2

saturation point

Answer 2

point where no more additional solid can be dissolved

Question 3

an aqueous solution freezing point _____

Answer 3

decreases

Question 4

an aqueous solution boiling point _____

Answer 4

increases

Question 5

for a solution to ______, Hmix = (around) Hsolute + Hsolvent

Answer 5

form or dissolve

Question 6

if a solution forms, entropy _____

Answer 6

increases

Question 7

delta Hmix

Answer 7

the energy produced when the two substances are mixed (-)

Question 8

Delta Hsolute

Answer 8

energy needed to pull molecules of the solute apart (+)

Question 9

delta Hsolvent

Answer 9

energy need to pull molecules of the solvent apart (seperate the salt ions) (+)

Question 10

miscible

Answer 10

mix in all proportions, so its a solution formation

Question 11

like dissolve like

Answer 11

polar dissolves polar, non polar dissolves nonpolar

Question 12

hydrate is _____

Answer 12

amount of water molecules in a substance

Question 13

stronger the intermolecular forces, __________ solubility

Answer 13

greater

Question 14

increases carbon chain length increases ______ in nonpolar solutes

Answer 14

solubility

Question 15

henry’s law

Answer 15

Sgas=K*Pgas k = henry’s law constant k P = pressure

Question 16

freezing point and boiling point are determined by the amount of __________

Answer 16

particles in a solution

Question 17

freezing point depression

Answer 17

freezing point lowering (delta T) depends on ONLY the number of particles in a solution AKA concentration

Question 18

study the six type of concentration formulas

Answer 18

ok

Question 19

molality =

Answer 19

moles of solute / kg of solvent

Question 20

Molarity =

Answer 20

moles of solute / liters of solution

Question 21

colligative properties

Answer 21

depend on the NUMBER of particles in a solution. EX: vapor pressure

Question 22

delta Tf (change in temp ) =

Answer 22

i Kfm (i = van’t hoff m = molality) REMEBER TO ADJUST THE FREEZING OR BOILING POINT RESPECTIVELY.

Question 23

Van’t Hoff factor

Answer 23

the amount a solution differs from an ideal solution

Question 24

coulombic atractions depend on two facters

Answer 24

distance and charge

Question 25

as ion paring increases the value of I _________

Answer 25

decreases

Question 26

ion paring is ________ and depends on _____ and ______

Answer 26

coulombic attractions, charge, distance

Question 27

to get ideal i, _______

Answer 27

add up the charges

Question 28

with freezing depression, ______ has more of an impact than _________

Answer 28

charge, molality

Question 29

for molecular substances, i = _____

Answer 29

1

Question 30

unless you are told otherwise, density of soln = _______ so ____ = mL

Answer 30

water or 1 so g = mL

Question 31

rual's law

Answer 31

P solution = Xsolvent * Psolvent P=vapor presure

Question 32

the solubility of gasess ______ with increasing temperatures

Answer 32

decreases

Question 33

energy threshold require to facilitate a reaction

Answer 33

Ea (activation energy)

Question 34

Arrhenius equation

Answer 34

K= Ae^(-Ea/(RT)) R is constant 8.134? and Ae is average energy t = temp in kelvin

Question 35

put in rate lecture notes

Answer 35

oky dok

Question 36

ln(K1/K2) =? (think Arrhenius)

Answer 36

(Ea/R)((1/T1)-(1/T2)) T in kelvin, Ea and R in JOULESSSSSSS per mol

Question 37

equilibrium =

Answer 37

rate of dissolution = rate of deposition

Question 38

Tf and Tb =?

Answer 38

Tf = freezing point Tb= Boiling point

Question 39

saturated must have _____

Answer 39

undissolved solute, it is the maximum concentration

Question 40

increase in temperature = increase in ________(think solutions)

Answer 40

Solubility

Question 41

unsaturated must have _____

Answer 41

no solid present

Question 42

______ dissolves ______

Answer 42

like dissolves like

Question 43

ppm and formula

Answer 43

parts per million, mass of comp in soln/total mass of soln x 10^6

Question 44

ppb and formula

Answer 44

parts per billion, mass of comp in soln/total mass of soln x 10^9

Question 45

vapor pressure of solution =

Answer 45

mole fraction of solvent times partial pressure of solvent or Psolution = XsolventP*solvent