ACS Final 2015 Flashcards
How to find Kw
[H30+][OH-]=1.0*x10^14
How to find Kw
[H30+][OH-]=1.0*x10^14
How to find pKa
-log(Ka)
[H3O+]
Square root of (Ka)(initial concentration)
STRONG ACIDS
HCl, HBr, HI, HClO4, H2SO4, HNO3
Weak acids Ka…
Weak acid + strong base pH …
> 7
Strong acid + weak base titration pH…
Buffer equation
pH=pKa + log([salt]/[acid])
Ka =
Concentration of products divided by concentration of reactants
1st Law of Thermodynamics
mass is neither created nor destroyed
2nd Law of thermodynamics
entropy will always increase in the natural world
3rd Law of thermodynamics
A perfect crystalline solid is 0 K
Enthalpy
heat is absorbed
Delta H
Exothermic
Delta H > 0
Endothermic
Entropy
disorder of a substance
+delta S
More randomness
Gibbs Free Energy
⋀G=⋀H-T⋀S
⋀G +
SPONTANEOUS
⋀G -
Non-spontaneous
Gas equilibrium constant
⋀G = -RTln(K)
Low Ksp
Low solubility
Le Chât’s Principle
Equilibrium will shift in response stop temperature, pressure or concentration