Question

Which reaction produces an insoluble product?

A
2KI + Pb(NO )2 → → PbI, + 2KNO
B
2AgNO3 + Ca(CH,02)2 + Ca(NO3)2 + 2AgC,H,O,
C
3BaCl2 + ALLS
→ 2AlCl3 + 3BaS
.
D
SrBr, + Mg(OH)2 → MgBr, + Sr(OH)2

Answer 1

Answer: The correct option is A).

Step-by-step explanation:

Precipitation reaction is defined as the reaction where a solid precipitate (solid substance) is formed at the end of the reaction. It is insoluble in water.

For the given chemical reactions:

A):
`2KI+Pb(NO_3)_2\rightarrow PbI_2+2KNO_3`

The iodide of lead is generally insoluble in water. Thus, lead iodide is a precipitate.

B):
`2AgNO_3+Ca(CH_3COO)_2\rightarrow Ca(NO_3)_2+2CH_3COOAg`

The nitrates and acetates of all metals are soluble in water.

C):
`3BaCl_2+Al_2S_3\rightarrow 2AlCl_3+3BaS`

The sulfide of barium is soluble in water.

D):
`SrBr_2+Mg(OH)_2\rightarrow MgBr_2+Sr(OH)_2`

The hydroxide of strontium is soluble in water.

Hence, the correct option is A).