Precipitation Reaction: Sodium Iodide with Mercury(II) Chloride

Contents

CCA!
Sodium iodide solution is added to mercury(II) chloride solution. Both the reactants and products are toxic.

Adding very pale yellow sodium iodide to colorless mercury(II) chloride produces an orange precipitate.

Solution A: 0.5 M sodium iodide (very pale yellow)
Solution B: 0.1 M mercury(II) chloride (colorless)
Precipitate: mercury(II) iodide (orange)

Chemcial Equation

HgCl2(aq) + 2 NaI(aq) === HgI2(s) + 2 NaCl(aq)