(BLUE) Solubility Flashcards
What are the two processes that must occur for a solid to be soluable
Pg1
The ionic lattice must be broken up
The ions are hydrated with the water/solvent molecules
What is the definition of delta H lattice
Pg1
Lattice enthalpy is the enthalpy change when 1 mole of the solid ionic lattice is formed from its constituent gaseous ions, under standard conditions of 298k 100kpa
What is the definition of delta H hydration
Pg2
It is the entropy change when one mole of gaseous ions dissolved in water to form an infinitely dilute solution
Is exothermic as forms bonds with the water molecules
What is the definition of entropy if solution delta H solution (soln)
Is is the enthalpy change when one mole of an ionic solid is dissolved in water to form an infinitely dilute solution
Pg 2
What is the equation for delta H solution
Pg2
Delta H sol = delta H hyd- delta H latt
What effects the value of lattice enthalpy
Pg3
SIZE AND CHARGE
What happens to the solubility when the lattice enthalpy increases
Pg 4
It increases solubility
If lattice enthalpy has a larger value, the compound is less soluble. If the hydration enthalpy has larger value, the compound is highly solvable in water
What happens to the amount of free water molecules to a ion which has a higher delta H solution
Pg 5
It will have a greater number of free water molecules
Pg 7
Draw a Hess diagram involving delta h sol hyd latt
Check chem folder
What value does delta h solution have to be unordered to be soluable
Pg 10
More negative
Can delta G be used for solubility ?
Yes
What does delta h and delta S stand for
Delta H is - enthalpy
Delta S is entropy
What is the difference between entropy and enthalpy
Entropy - is to do with disorder
Enthalpy is to do with energy transfer
