Select correct statement :- (1) When we add small amount of NaOH in acidic buffer solution, pOH of solution is - Chemistry - Chemical and Ionic Equilibrium

Question

Select correct statement :-
(1) When we add small amount of NaOH in acidic buffer solution, pOH
of solution is increases
(2) When we add small amount of NaOH in basic buffer solution pH of
solution is decreases
(3) When we add small amount of water in acidic buffer solution, pH
of solution is decreases
(4) When 100 mL of 0 2 M CH3COOH react with 100 mL of 0 1 M NaOH
buffer solution is formed
Please explain this

Yasodharan · Accepted Answer

Dear Student,

The correct answer will be Option (4) "when 100 ml of 0 2 M acetic
acid react with 100 ml of 0 1 M NaOH buffer solution is formed"

Justification:

1 NaOH is hygroscopic in nature hence on direct addition with
acidic (or) basic buffer solution causes extend of heat generation
results in accident hence Option 1,2 and 3 is not suitable

2 Acetic acid is weak acid whence addition of hygroscopic NaOH
favours the formation of buffer solution an ideal solution

Regards