Chemistry Formulas

Atomic Structure

E = h * v

E(Energy):
h(Planck's Constant): 6.626 * 10^-34 J s
v(Frequency):

c = (wavelength) * v

c(Speed of Light): 3 * 10^8 m/s
Wavelength:
v(Frequency):

Equilibrium

pH/POH

pH/pOH:
[H+]/[OH-]:

Henderson Hasselbalch

pH:
pKa:
[A-]:
[HA]:

Kinetics

1st Order Rate Law

[A] at time t:
[A] initial:
k:
t:

2nd Order Rate Law

[A] at time t:
[A] initial:
k:
t:

Half Life

k(Rate Constant):
t 1/2(Half Life):

Gases, Liquids, and Solutions

PV=nRT

P(Pressure):
V(Volume):
n(Number of Moles):
T(Temperature):

Thermochemistry/Electrochemistry

q=mc(change in t)

q(Heat):
m(Mass):
c(Specific Heat):
t(Change in Temperature):

Calculate change in G

Change in H - T(Change in S)

ΔG(Standard Free Energy):
ΔH(Standard Enthalpy):
ΔS(Standard Entrophy):
t(Temperature):

-RTln(k)

Delta G(Standard Free Energy):
K:
t(Change in Temperature):

-nFE

Delta G(Standard Free Energy):
n(number of moles:
E(Standard Reduction Potential):

I = q/t

I(current):
q(charge):
t(time):