cgier 34 Flashcards
the dissolution and precipitation of limestone ( CaC03) is responsible for the formation of
limestone caverns in featuring statlactics and stalagmites
the solubility phenomena is important as: nail –> na + cl because its important for — like:
- biological process
- important for absorption of nutrients
- important for mineralisation
- application in drug silvery and diagnostic process
solubility equilibria is in — solutions where dynamic equilibrium exists between — and — and the rate of the —- is — to the rate of —- and the concentration of ions will be —
- staturated
- undissolved solids
- ions
- dissolutions equals the rate of precipitation
- constant
solids dissolving to form aqouse solutions as:
- ionic solid ( CaF2) — to form completely separate — and —
- as dissolution proceeds the ca2+ and f- will —-
- which will lead to – probability of ions colliding to —
- second competing process is going the opposite directions
- going right is: — and going left is —
- at equilibrium the solution is said to be —
- dissolves to from hydrated cations ca2+ and fe- anions
- increases , increases
-dissolution - precipitation
- saturated
— is the constant for the equilibrium between solid solutes and ions in saturated solutions
- solubility product constant ( ksp)
- ksp= dissolved ions only aka the product and no solids
why there’s no solids in ksp?
more solid leads to – in surface area which — the solubility which gives greater chance for ions to reform into —
- greater , greater
- solids
solubility product has only — value for a given solid at a particular temp
one value
solubility product has – number of values at a given temp depending on their condition( as ph, common ion ) that impacts the solubityy
- infinite
– is the number of moles of substance that can be dissolved in 1 litter for solution reaching saturation
molar solubility
the molar solubility can be calculated from — and — and the units are —-
- solubility product constant ( ksp ) and stoichometric coefficient
- mol/L
example: calculate the ksp for CaF2 if the molar solubility of CaF2 is 3.4 x 10-4 mol/l
formula: caf2 –> ca2+ + 2f-
ksp = dissolved ions
= [3.4 x 10-4 ] x [2 x 3.4 x 10-4]power 2
= [ 4 x 3.4 x 10-4 ] power 3
— are direct indicators for solubility for different salts if the salts produce the same number of ions
larger the KSP – the solubity
- ksp
- larger
ksp can’t be used as a direct comparison of solubility for salts that produce — number of ions in a solution
- different
solubility is – when in the presence of a second sole which is known as —- effect
- lowered
- common ion effect
ph affects the —
as we increase the ph —–
as we decrease the ph
- solubility
- decreases , increase of 0H , left
- increases , decrease of OH , right