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Chemistry 111 Concept Map - Coggle Diagram
Chemistry 111 Concept Map
Chemical Kinetics (Reactions Occur through Collisions)
reaction order
sum of orders
1st order [A]t=[A]0 e^-kt
2nd order 1/[A]t=kt+1/[A]0
rate law (rate=K[A]^m[B]^n (m&n are reaction orders)
reaction rate
determined by concentration and temperature
Arrhenius Equation lnk1/k2=Ea/R(1/t2-1/t1) R=8.314 J/mol*k
half-life t1/2= 0.693/K
Equilibrium
Equilibrium Constant Keq
products/reactants (use the coefficients from reaction for powers
reaction Quotient
Q=k @ equilibrium
if Q is greater than K then reaction is in reversed, if Q is less than K then reaction is forward
Thermodynamics
Free Energy
Gibbs Free Energy DeltaG=DeltaH-TDeltaS
H=change in enthalpy. S=change in entropy T=temp in kelvin
will help to determine if reaction will occur spontaneously (G is negative when reaction is spontaneous)
enthalpy
enthalpy tells how much heat and work was added or removed from the substance
entropy
he amount of entropy is also a measure of the molecular disorder, or randomness, of a system.
Acid Base Equilibrium
Acids
Strong acids completely dissociate, weak acids do not
Ha=a-+H+
pH
pH=-log[H+]
Concentration of pH [H3O+]=10^-pH
pOH=-log[OH]
K
pKa=-log[Ka]. Ka=10^-pka
Henderson Hasselbalch
pH=pKa+log[A-]/[HA]
Electrochemistry
redox reactions
use oxidation states and break up the equation into two equations in order to balance
acidic use H+ to balance H for basic use OH to balance
Cell potential
Ecell=Ecathode-Eanode
if the answer is positive it will be spontaneous