cgier 36 Flashcards
to find the Pka :
-log Ka
Kb x Ka =
10 -14
Pka + pKb =
14
smaller the Pka —
smaller the Ka —
stronger the weak acid , weaker the acid
smaller Pkb —- , smaller the Kb –
stronger the base , weaker the base
( check slide 13)
the Pka can tell you how —-
strong or weak the weak acid or weak base is ( example smaller the pKa the stronger the acid and stronger the base )
the types of acids :
1- polymortic acid —
2- monoprotic acid
3- diprotic acid —
4- triprotic acid —
- many protons of H+
- 1 available proton
- 2 available protons
- 3 available protons
( check slide 17 :
Ka1 > Ka2 > Ka 3 )
— is the reaction of the compound with h+ ion or the OH- ion derived from water it only occurs in — and not —
- hydrolysis of salts
- weak acids and bases
- ions derived from strong acids and bases as: HCl and NaOH
salt id derived from — and it will —- and it will results in – solution
Na+ is derived from — so —
Cl- is derived from — so —
- acid and bases
- competly dissociates into its acid and base parts ( NaCl –> Na+ + Cl - )
- neutral
- strong base so it doesn’t undergo hydrolysis
- strong acid so it doesn’t undergo hydrolysis
the hydrolysis of salt derived from weak acid and a strong base as: CH3COONa –> Na + CH3COO- will result in — solution , the weaker the acid the – of hydrolysis
- basic
- greater the extent
the hydrolysis of salt derived from strong acid and weak base as: NH4Cl —> Cl - + NH4+ will result in —
the weaker the base the – the exetent of the hydrolysis
-acidic
- greater
weak acid and weak base in hydrolsis of salt will lead to — and both hydrolysis occurs at the — extent
- neateral if kb = ka and acidic if ka> or basic if kb >
- same
to find the Ka if the Pka is given :
ka = 10 power -pka
( check slide example )
