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AP Chemistry Master Formula List
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Key Concepts:
Terms in this set (44)
Formula: Percent Composition
Mass of element / Mass of compound * 100
Formula: Percent Yield
Actual yield / Theoretical Yield * 100
Formula: Boyle's Law
P1V1 = P2V2
How to Remember: Boyle's Law
Boy's Peas and Vegetables
Formula: Charles' Law
V1/T1 = V2/T2
How to Remember: Charles' Law
Charlie Brown Christmas on TV
Formula: Combined Gas Law
P1V1/T1 = P2V2/T2
How to Remember: Combined Gas Law
Peas and Vegetables on a Table
Formula: Ideal Gas Law
PV = nRT
Formula: Molecular Weight/Density of a Gas
MW = dRT/P
How to Remember: Molecular Weight/Density of a Gas
DiRTy P
Formula: Dalton's Law of Partial Pressures
P(total) = P1 + P2 + P3...
Formula: Mole Fraction
X1 = n1 / (n1 + n2 + n3...)
Formula: Finding partial pressure with mole fraction
P1 = P(total) * X1
Formula: Average Kinetic Energy of a Gas
3/2RT
Formula: Root mean square velocity
u(rms) = √(3RT/M)
M = mass in kg
Formula: Graham's Law of Effusion
Rate 1 / Rate 2 = √(MW1) / √(MW2)
Formula: van der Waals Equation (Non-Ideal Gases)
(P + an/v^2)(V-nb) = nRT
Formula: Speed of Light in terms of λ and v
λV = c
Formula: Energy in terms of Planck's Constant
E = hV
Formula: Wavelength in terms of Planck's Constant
λ = h/mv
Formula: Photon Energy
E = hc/λ
How to Remember: Photon Energy
E = Two constants / Wavelength
Formula: Energy from Hydrogen Emission in Bohr Model
E = -2.178e-19((1/n2) - (1/n1)
n = orbital levels fallen
Formula: Kinetic Energy
KE = 1/2mv^2
Formula: Energy in terms of Heat
E = q + w
Formula: Work done by Pressure
w = -PΔV
Formula: Enthalpy of a System
H = E + PV
How to Remember: Enthalpy of a System
Hepatitis V
Formula: Heat Capacity
Heat absorbed/Increase in temperature
Formula: Heat Changes in a System
q = mcΔT
How to Remember: Heat Changes in a System
MCat
Formula: Heat in Constant Volume Calorimetry
Q = ΔT * Heat Capacity of Calorimeter
Formula: Beer's Law
A = abc
Variables of: Beer's Law
A = absorbance
a = molar absorptivity
b = path length of cuvette
c = concentration
Formula: Average Rate
-Δ[A] / ΔT
Formula: Zero-Order Integrated Rate Law
[A] - [Ao] = -kt
Formula: First Order Integrated Rate Law
ln([A/Ao]) = -kt
Formula: Second Order Integrated Rate Law
(1/[A]) - (1/[Ao]) = kt
Formula: Zero Order Half-Life Equation
t(1/2) = [Ao]/2k
Formula: First Order Half-Life Equation
t(1/2) = 0.693/k
Formula: Second Order Half-Life Equation
t(1/2) = 1/([Ao]k)
Formula: Law of Mass Action or Equilibrium Expression
Kc = ([C]^l)([D]^m) / ([A]^j)([B]^k)
Formula: Equilibrium Constant for Pressures
Kp = Kc(RT)^(Δn)
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