What's not on the AP Chem Formula Sheet

Molar Heat of Solution

• ΔH°_soln = @@\frac{q}{n}@@

• ΔH°_soln = q + n

• ΔH°_soln = q - n

• ΔH°_soln = n/q

Ideal Gas Law Rearrangement

• @@rac{P_{1}V_{1}}{T_{1}} = rac{P_{2}V_{2}}{T_{2}}@@

• @@P_{1}V_{1}T_{2} = P_{2}V_{2}T_{1}@@

• @@rac{P_{1}T_{1}}{V_{1}} = rac{P_{2}T_{2}}{V_{2}}@@

• @@P_{1}V_{2} = P_{2}V_{1}@@

Enthalpy of Reaction

• @@ΔH°_{rxn} = Σ ext{bonds broken} - Σ ext{bonds formed}@@

• @@ΔH°_{rxn} = Σ ext{bonds formed} - Σ ext{bonds broken}@@

• @@ΔH°_{rxn} = Σ ext{products} - Σ ext{reactants}@@

• @@ΔH°_{rxn} = Σ ext{reactants} - Σ ext{products}@@

Equilibrium Constant

• @@K = e^{-rac{ΔG°}{RT}}@@

• @@K = rac{[products]}{[reactants]}@@

• @@K = rac{ΔG°}{RT}@@

• @@K = e^{rac{ΔG°}{RT}}@@

Combos & Rearrangements: Moles

• Molarity x Volume (in Liters) = moles

• Molarity + Volume (in Liters) = moles

• Molarity - Volume (in Liters) = moles

• Molarity / Volume (in Liters) = moles

Energy of a Photon

• @@E=rac{hc}{λ}@@

• @@E=mc^2@@

• @@E=hf@@

• @@E=rac{1}{2}mv^2@@

Hydroxide Ion Concentration

• @@[OH^{-}] = 10^{-pOH}@@

• @@[OH^{-}] = 10^{pH}@@

• @@[OH^{-}] = 14 - pH@@

• @@[OH^{-}] = pH - 7@@

Percent Error

• @@rac{ ext{Actual} - ext{Theoretical}}{ ext{Theoretical}} imes 100\%@@

• @@rac{ ext{Theoretical} - ext{Actual}}{ ext{Actual}} imes 100\%@@

• @@rac{ ext{Actual} + ext{Theoretical}}{ ext{Theoretical}} imes 100\%@@

• @@rac{ ext{Theoretical} + ext{Actual}}{ ext{Actual}} imes 100\%@@

Hydrogen Ion Concentration

• @@[H^{+}] = 10^{-pH}@@

• @@[H^{+}] = 10^{pH}@@

• @@[H^{+}] = pH@@

• @@[H^{+}] = 1/pH@@

Standard Cell Potential

• E°_cell = E°_cathode - E°_anode

• E°_cell = E°_anode - E°_cathode

• E°_cell = E°_cathode + E°_anode

• E°_cell = E°_cathode * E°_anode