chem quiz 2

Question 1

variable for entropy

Answer 1

“S”

Question 2

which state of matter has the highest entropy

Answer 2

gas

Question 3

what is related to the freedom of motion of the particles

Answer 3

entropy

Question 4

does a solution, pure solute, or pure solvent have the highest entropy

Answer 4

solution

Question 5

systems change toward (lower/higher) entropy

Answer 5

higher entropy

Question 6

systems change toward (lower/higher) enthalpy

Answer 6

lower enthalpy

Question 7

contains the maximum amount of dissolved solute at a given temperature in the presence of undissolved solute

Answer 7

saturated solution

Question 8

in equilibrium with dissolved solute

Answer 8

undissolved solute

Question 9

contains less than the equilibrium concentration of dissolved solute

Answer 9

unsaturated solution

Question 10

solids become (more/less) soluble at higher temperatures

Answer 10

more

Question 11

gasses become (more/less) soluble at higher temperatures

Answer 11

less

Question 12

as pressure increases, gas solubility (increases/decreases)

Answer 12

increases

Question 13

the solubility of a gas is (directly/inversely) proportional to the partial pressure of the gas above the solution

Answer 13

directly

Question 14

the pressure that must be applied to prevent the net flow of solvent

Answer 14

osmotic pressure

Question 15

properties that depend on the number of solute particles, not their chemical identity

Answer 15

colligative properties

Question 16

the vapor pressure of a solution containing a nonvolatile nonelectrolyte is always (lower/higher) than the vapor pressure of the pure solvent

Answer 16

lower

Question 17

Raoult’s law states that the vapor pressure of the solvent is (directly/inversely) proportional to the mole fraction of the solvent present

Answer 17

directly

Question 18

the boiling point elevation is proportional to the (molality/molarity) of the solution

Answer 18

molality

Question 19

for a volatile nonelectrolyte, the vapor of the solution contains…

Answer 19

both solute and solvent

Question 20

the study of reaction rates and the factors that affect them

Answer 20

chemical kinetics

Question 21

the change in the concentrations of reactants or products as a function of time

Answer 21

reaction rate

Question 22

rate =

Answer 22

change of concentration / change in time

Question 23

mol / L * s

Answer 23

0 order

Question 24

mol L -1 s -1

Answer 24

0 order

Question 25

1/s

Answer 25

1st order

Question 26

s -1

Answer 26

1st order

Question 27

L / mol *s

Answer 27

2nd order

Question 28

L mol -1 s -1

Answer 28

2nd order

Question 29

L^2 / mol^2 * s

Answer 29

3rd order

Question 30

L^2 mol -2 s-1

Answer 30

3rd order

Question 31

integrated rate law 1st order rearranged

Answer 31

ln [A]t = -kt + ln [A]0

Question 32

integrated rate law 2nd order rearranged

Answer 32

1/[A]t - 1/[A]0 = kt

Question 33

integrated rate law 1/2 life rearranged

Answer 33

[A]t - [A]0 = -kt

Question 34

steps for finding reaction orders with experimental data (in terms of [A])

Answer 34

1. find which row [B] has a consistent concentration 2. divide one concentration over the matching time 3. divide second concentration by matching time 4. find out which power will take you from first answer to second

Question 35

ammonium

Answer 35

NH 3+

Question 36

hydronium

Answer 36

H3O+

Question 37

hydroxide

Answer 37

OH-

Question 38

nitrite

Answer 38

NO2 -

Question 39

nitrate

Answer 39

NO3 -

Question 40

carbonate

Answer 40

CO3 2-

Question 41

hydrogen carbonate

Answer 41

HCO 3-

Question 42

phosphate

Answer 42

PO4 3-

Question 43

sulfite

Answer 43

SO3 2-

Question 44

sulfate

Answer 44

SO4 2-

Question 45

(T/F) the greater the energy of activation, the slower the reaction will be

Answer 45

true

Question 46

(T/F) colligative properties of solutions depend on the number of solute particles present in the solution

Answer 46

true

Question 47

(T/F) dissolving a solute in a solvent lowers the vapor pressure of the resulting solution compared to the pure

Answer 47

true

Question 48

(T/F) osmotic pressure is the force required to prevent the movement of solvent molecules through a semi-permeable membrane

Answer 48

true

Question 49

(T/F) the rate law can be readily predicted from the balanced chemical equation of a reaction

Answer 49

false

Question 50

(T/F) the half life of a first-order reaction remains constant regardless of the initial concentration of the reactant

Answer 50

true

Question 51

i of sodium sulfate

Answer 51

3

Question 52

does i increase with osmotic pressure

Answer 52

yes

Question 53

what is the order of a reaction when the plotted line is linear

Answer 53

first order

Question 54

molarity formula

Answer 54

moles of solute / liters of soln

Question 55

molality formula

Answer 55

moles of solute / kg of solvent