Cheatography
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A cheat sheet for the AP Chemistry 2016 test
This is a draft cheat sheet. It is a work in progress and is not finished yet.
Standard Symbols
L |
Liters |
mL |
Milliliters |
nm |
Nanometers |
atm |
Atmospheres |
mm Hg |
Millimeters of Mercury |
J |
Joules |
kJ |
Kilojoules |
V |
Volts |
mol |
Moles |
E |
Energy |
ν |
Frequency |
λ |
Wavelength |
k |
rate constant |
t |
time |
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Standard Values
Mole |
6.02×1023 |
Standard Temperature |
273K |
0°C |
32°F |
Standard Pressure |
1 atm |
760 mm Hg |
760 torr |
Equilibrium Constants
Kc |
Molar Concentrations |
Kp |
Gas Pressures |
Ka |
Weak Acid |
Kb |
Strong Acid |
Kw |
Water |
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Equilibrium
Equilibrium Tips |
Place products over reactants |
In an equation if there is 2 moles of a compound then in the equilibrium expression the value of that compound in the expression is squared |
Don't add solids to equilibrium expressions |
Changes in molarity or pressure on one side of the equation will reflect opposite on the other side of the equation |
To find equilibrium constant in a reaction |
Write reaction equation |
Write equilibrium expression with products over reactants and squaring any products of reactants that have more than one mole in the equilibrium equation |
Find the molarity of all the compounds in the equation by dividing the moles of the compound by the volume of the container in liters |
Substitute the molarity values into the equilibrium expression and solve for Kc |
To find molar amounts using equilibrium constant for the equation |
Find all known molarities of compounds in equation |
Set up equilibrium expression with products over reactants and substitute in a variable for the unknown molarity |
Solve for variable using the equilibrium constant for that reaction |
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