Lead Acetate when reacts with `A gives black ppt PbCl2
![Lead Acetate when reacts with `A gives black ppt PbCl2](/img/relate-questions.png)
| Lead Acetate when reacts with `A', gives black ppt
A. PbCl2
B. PbCO3
C. PbCrO4
D. PbS
Please scroll down to see the correct answer and solution guide.
Right Answer is: D
SOLUTION
Try to recall the properties of Lead acetate.
When H2S gas is passed through the solution of (CH3COO)2Pb, black ppt. of PbS is formed.
(CH3COO)2Pb+H2S→2CH3COOH+PbS↓
Black ppt.
But,
With potassium chromate K2CrO4:
(CH3COO)2Pb+K2CrO4→PbCrO4↓+2CH3COOK
Lead chromate
(yellow ppt.)
On addition of HCl in (CH3COO)2Pb solution, white ppt of PbCl2 is formed in cold conditions, which dissolves on heating. On cooling, PbCl2 reaooears as a white crystalline solid.
(CH3COO)2Pb+2HCl→PbCl2+2CH3COOH
dilLead chloride
(white ppt).
and same with NaHCO3,
(CH3COO)2Pb+2NaHCO3→PbCO3↓+2CH3COONa
(white ppt)