TargetIIT

1) Equimolar quantities of  each of the following substances are dissolved in enough water to make 1 L of solution. Arrange the solution so prepared in order of increasing pH.
(a) KHSO[ss]4  [/ss] (b) NaHCO[ss]3[/ss]               (c) Na[ss]2[/ss]O          (d) HClO[ss]4[/ss]                   (e) CH[ss]3[/ss] NH[ss]3[/ss] Br

2) Calculate the pH of a 0.15 M aqueous solution of AlCl [ss]3[/ss] , Given:-

[Al (H2O)[ss]6[/ss]] [p]3+[/p]  + H[ss]2[/ss]O (l) → [Al (H[ss]2[/ss]O)[ss]5[/ss] OH][p]2[/p][p]+[/p]  (aq)  + H[ss]3[/ss]O[p]+[/p] (aq)  ......K[ss]a [/ss]= 1.4 X 10[p]-5[/p]

3) Find the pH of the solution obtained when 25 mL of 0.005 M benzylamine is titrated to the equivalence point with 0.005 M H Cl. pK[ss]b[/ss] of benzylamine is 9.33

4) 10 mL of 0.1 M CH[ss]3[/ss]COOH (pKa = 4.74) is titrated with 0.1 M NaOH. What is the pH when :-
(a) 5 mL of NaOH has been added
(b) 10 mL of NaOH has been added

3. salt hydrolysis will do solve your question

4. (a) It is a buffer solution
  (b) it is case of salt hydrolysis

Thanq Manish sir [4]

Still need help in 1st and 2nd Problems