he formula unit for the ionic compound, mercuric chloride, consists of which of the following?

a 1 Hg2+ ion and 2 Cl- ions
b 1 Hg+ ion and 1 Cl- ion
c 1 Hg22+ ion and 2 Cl- ions
d 2 Hg+ ions and 1 Cl2- ion
e 1 Hg22+ ion and 1 Cl2- ion

1 answer

The correct formula for mercuric chloride is \( \text{HgCl}_2 \). In this compound, there is one mercuric ion (Hg²⁺) and two chloride ions (Cl⁻).

Therefore, the correct answer is: a 1 Hg²⁺ ion and 2 Cl⁻ ions.