complete question:
In a double-replacement reaction , _____.
a. the reactants are usually a metal and a nonmetal
b.one of the reactants is often water the reactants
c. the reactants are generally two ionic compounds in aqueous solution
d. energy in the form of heat or light is often produced
Answer:
c. the reactants are generally two ionic compounds in aqueous solution
Step-by-step explanation:
A double replacement reaction is a kind of chemical reaction where two compounds reacts and the cations and anions of the reacting compound exchange places to form two new compound or products.
The double replacement reaction is also known as a double displacement reaction. A precipitate is usually form in this kind of reaction. The two reactant that takes place in this reaction are ionic in nature. Example of a double replacement reaction is the reaction between silver nitrate and sodium chloride to precipitate silver chloride and produce a soluble sodium nitrate.
AgNO3 + NaCl → AgCl + NaNO3 .
The sodium cation replace Ag in it compound while Ag replace Na in it compound. The anions also exchange places too.