NH4OH is a weak base but it becomes still weakerin the aqueous solution of

Question

NH4OH is a weak base but it becomes still weakerin the aqueous solution of (A) 0.1 M HCl (B) 0.1 M NH4Cl (C) 0.1 M H2SO4 (D) 0.1 M CH3COOH

Tardigrade Admin · Accepted Answer

Common ion effect is observed when a solution of weak electrolyte is mixed with a solution of strong electrolyte which provides an ion common to that provided by a weak electrolyte.
Ammonium hydroxide is a weak electrolyte and ammonium chloride is a strong electrolyte. Ammonium chloride provides ammonium ion which is common to that provided by ammonium hydroxide.
Thus the pair

N H_{4} O H + N H_{4} Cl

shows common ion effect. Ammonium chloride suppresses the ionization of ammonium hydroxide.
Hence, ammonium hydroxide becomes still weaker in the presence of an aqueous solution of ammonium chloride.

Q. $N H_{4} O H$ is a weak base but it becomes still weakerin the aqueous solution of

$0.1 M H Cl$

$0.1 MN H_{4} Cl$

$0.1 M H_{2} S O_{4}$

$0.1 MC H_{3} COO H$

Q. NH4​OH is a weak base but it becomes still weakerin the aqueous solution of

0.1MHCl

0.1MNH4​Cl

0.1MH2​SO4​

0.1MCH3​COOH

Q. $N H_{4} O H$ is a weak base but it becomes still weakerin the aqueous solution of

$0.1 M H Cl$

$0.1 MN H_{4} Cl$

$0.1 M H_{2} S O_{4}$

$0.1 MC H_{3} COO H$