Question

NH4OH is highly soluble in
(1) CuSO4 (aq)
(2) AgNO3(aq)
(3) NH4Cl
(4) Both (1) & (2)
​

Answer 1

Explanation:

The sparing solute hydroxides derived from Fe

3−

,Cr

3−

and AI

3+

ions are precipitated by the addition of ammonia hydroxide, (NH

4

OH) solute in the presence of excess ammonium chloride, NH

4

CI and NH

4

OH helps in maintaining the pH,

Hydroxide K at 25

∘

C

AI(OH)

3

1.4×10

−34