Final Exam Review

Question 1

What is molality (m)

Answer 1

Moles of solute/kg of solvent

Question 2

What are the three types of unit cells covered?

Answer 2

Simple (SCC)
Face-Centered (FCC)
Body-Centered (BCC)

Question 3

What is the formula for the SCC unit cell

Answer 3

a = 2r

Question 4

What is the formula for the FCC unit cell

Answer 4

a = sqrt(8) * r

Question 5

What is the formula for the BCC unit cell

Answer 5

4r/sqrt(3)

Question 6

Are all solutions homogenous or hetergenous…

Answer 6

Homogenous; Made up of 2 or more substances

Question 7

If two substances have similar IMF’s, will they dissolve in one another

Answer 7

Yes; they will dissolve in one another as like dissolves like

Question 8

What is the formula for trying to find solubility of a gas in regards to pressure

Answer 8

C𝚐 = kP𝚐

C𝚐 = Gas Solubility
k = Constant of that particular gas-liquid system and temperature
P𝚐 = Partial Pressure

Question 9

Define Raoult’s Law

Answer 9

P(solution) = X(solvent) * P°(solvent)

P(solution) = Vapor pressure of solvent in solution
X(Solvent) = Mole Fraction of the solvent
P°(Solvent) = Vapor pressure of the pure solvent

Question 10

What is the formula for the Freezing Point Elevation (ΔT𝘧)

Answer 10

ΔT𝘧 = imk𝘧

m = molality
kf = freezing point constant
i = ions dissociated

Question 11

What is the formula for the Boiling Point Elevation (ΔT𝘣)

Answer 11

ΔTb = imk𝘣

m = molality
k𝘣 = Boiling point constant
i = ions dissociated

Question 12

What are the different Colligative Properties that were covered?

(Hint: Deals with relationship between solute and solvent and specifically concentration of solute particles)

Answer 12

• Vapor Pressure Lowing
• Boiling Point Elevation
• Freezing Point Depression
• Osmotic Pressure

Question 13

What is the formula for Osmotic Pressure?

Answer 13

∏ = iMRT

M = Molarity
R = .08206
T = Temperature in K
i = ions dissociated

Question 14

When ∆Suniv > 0 is the reaction…

A) Spontaneous
B) Non-spontaneous
C) Equilibrium

Answer 14

A

Question 15

When ∆Suniv < 0 is the reaction…

A) Spontaneous
B) Non-spontaneous
C) Equilibrium

Answer 15

B

Question 16

When ∆Suniv = 0 is the reaction…

A) Spontaneous
B) Non-spontaneous
C) Equilibrium

Answer 16

C

Question 17

What is the formula for the ∆Suniv (in respect ∆Ssys & ∆Ssurr)

Answer 17

∆Ssys + ∆Ssurr = ∆Suniv

Question 18

What is the formula for ∆Ssurr

Answer 18

∆Ssurr = -∆Hsys/T

Question 19

What is the formula for Gibbs Free Energy, ∆G

Answer 19

∆G = ∆H - T∆S

Question 20

What is the formula for finding out the order for any reaction for reaction rates?

Answer 20

1/(M^x-1)*s

Question 21

What are the units for zero order for reaction rates?

Answer 21

M/s

Question 22

What are the units for first order for reaction rates?

Answer 22

1/s or s^-1

Question 23

What are the units for second order for reaction rates?

Answer 23

1/M^1 * s or M^-1*s^-1

Question 24

Are solute-solvent interactions greater than the combination of solute-solute and solvent-solvent in…

A) Endothermic
B) Exothermic

Answer 24

Exothermic

Question 25

Are solute-solvent interactions less than the combination of solute-solute and solvent-solvent in…

A) Endothermic
B) Exothermic

Answer 25

Endothermic

Question 26

What is the half life equation for zero order

Answer 26

t1/2 = [A]0/2k

Question 27

What is the half life equation for first order

Answer 27

t1/2 = .693/k

Question 28

What is the half life equation for second order

Answer 28

t1/2 = 1/[A]0k

Question 29

What is sublimation

Answer 29

Solid –> Gas

Question 30

What is melting

Answer 30

Solid –> Liquid

Question 31

What is deposition

Answer 31

Gas –> Solid

Question 32

Is dissolving a solid/salt in water a…

A) Physical Change
B) Chemical Change

Answer 32

Physical

Question 33

What do you assume the mass of water to be in % by mass questions?

Answer 33

100g

Question 34

Strong Acids

Answer 34

H2SO4
Halogens except HF
HClO4
HNO3