Question

what type of substance typically participates in double - replacement reactions?
a ionic compounds in the liquid state
b metals in the solid state
c molecular compounds in the gas state
d ionic compounds in aqueous solution

Explanation:

Double - replacement reactions typically involve ionic compounds in aqueous solution. In such reactions, the cations and anions of two ionic compounds exchange partners. For example, in the reaction \(AgNO_3(aq)+NaCl(aq)
ightarrow AgCl(s)+NaNO_3(aq)\), \(Ag^+\) and \(Na^+\) (cations) exchange their anionic partners (\(NO_3^-\) and \(Cl^-\)). Ionic compounds in aqueous solution exist as free - moving ions, which can easily recombine to form new ionic compounds (precipitates in some cases).
Metals in the solid state (option b) are in a metallic lattice structure and do not participate in double - replacement reactions in the solid state as they do not have the free - moving ions required for ion exchange. Ionic compounds in the liquid state (option a) are usually molten salts. While they have free - moving ions, double - replacement reactions are more commonly associated with aqueous solutions. Molecular compounds in the gas state (option c) consist of covalent molecules and do not dissociate into ions in the same way as ionic compounds in aqueous solution, so they are not typical participants in double - replacement reactions.

Answer:

D. ionic compounds in aqueous solution