Final Exam Review Flashcards
What is molality (m)
Moles of solute/kg of solvent
What are the three types of unit cells covered?
Simple (SCC)
Face-Centered (FCC)
Body-Centered (BCC)
What is the formula for the SCC unit cell
a = 2r
What is the formula for the FCC unit cell
a = sqrt(8) * r
What is the formula for the BCC unit cell
4r/sqrt(3)
Are all solutions homogenous or hetergenous…
Homogenous; Made up of 2 or more substances
If two substances have similar IMF’s, will they dissolve in one another
Yes; they will dissolve in one another as like dissolves like
What is the formula for trying to find solubility of a gas in regards to pressure
C𝚐 = kP𝚐
C𝚐 = Gas Solubility
k = Constant of that particular gas-liquid system and temperature
P𝚐 = Partial Pressure
Define Raoult’s Law
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
What is the formula for the Freezing Point Elevation (ΔT𝘧)
ΔT𝘧 = imk𝘧
m = molality
kf = freezing point constant
i = ions dissociated
What is the formula for the Boiling Point Elevation (ΔT𝘣)
ΔTb = imk𝘣
m = molality
k𝘣 = Boiling point constant
i = ions dissociated
What are the different Colligative Properties that were covered?
(Hint: Deals with relationship between solute and solvent and specifically concentration of solute particles)
- Vapor Pressure Lowing
- Boiling Point Elevation
- Freezing Point Depression
- Osmotic Pressure
What is the formula for Osmotic Pressure?
∏ = iMRT
M = Molarity
R = .08206
T = Temperature in K
i = ions dissociated
When ∆Suniv > 0 is the reaction…
A) Spontaneous
B) Non-spontaneous
C) Equilibrium
A
When ∆Suniv < 0 is the reaction…
A) Spontaneous
B) Non-spontaneous
C) Equilibrium
B
When ∆Suniv = 0 is the reaction…
A) Spontaneous
B) Non-spontaneous
C) Equilibrium
C
What is the formula for the ∆Suniv (in respect ∆Ssys & ∆Ssurr)
∆Ssys + ∆Ssurr = ∆Suniv
What is the formula for ∆Ssurr
∆Ssurr = -∆Hsys/T
What is the formula for Gibbs Free Energy, ∆G
∆G = ∆H - T∆S
What is the formula for finding out the order for any reaction for reaction rates?
1/(M^x-1)*s
What are the units for zero order for reaction rates?
M/s
What are the units for first order for reaction rates?
1/s or s^-1
What are the units for second order for reaction rates?
1/M^1 * s or M^-1*s^-1
Are solute-solvent interactions greater than the combination of solute-solute and solvent-solvent in…
A) Endothermic
B) Exothermic
Exothermic
