Question

Which of the following is a precipitation reaction?
a. 2 LiI(aq) +Hg2(NO3)2(aq) →Hg2I2(s) + 2 LiNO3(aq)
b. NaCl(aq) + LiI(aq)→ NaI(aq) + LiCl(aq)
c. HCl(aq) + KOH(aq)→ KCl(aq) + H2O(l)
d. Zn(s) + 2AgNO3(aq) → 2 Ag(s) +Zn(NO3)2(aq)
e. None of the above areprecipitation reactions.

Answer 1

Answer:

The precipitated are option a and d.

Explanation:

2 LiI(aq) +Hg2(NO3)2(aq)  →  Hg2I2(s) ↓ + 2 LiNO3(aq)

Cation Hg2+ 2 in the presence of iodide,  a precipitated  is formed.

Zn(s) + 2AgNO3(aq) → 2 Ag(s) ↓ +Zn(NO3)2(aq)

Zinc starts to get rid, and some white particles also stick to it. Afterwards the solution becomes cloudy and a precipitate appears, which is the solid silver