What are the products of a double displacement reaction?

Question

Avery Adams · Accepted Answer

One of the products must be a solid precipitate, an insoluble gas, or water.

When two aqueous ionic solutions react to form a solid precipitate, an insoluble gas, or water, this is known as a double displacement (double replacement) reaction; if none of these products are formed, then there was no double displacement. The general equation for a double displacement reaction is #"AX + BY"##rarr##"AY + BX"#, where #"A"# and #"B"# are cations, and #"X"# and #"Y"# are anions. Double displacement reaction examples. #"BaCl"_2("aq")" + MgSO"_4("aq")"##rarr##"BaSO"_4("s")darr"+ MgCl"_2("aq")"# #"Na"_2"S(aq)" + "2HCl(aq)"##rarr##"H"_2"S(g)"uarr"+ 2NaCl(aq)"# #"HCl(aq)" + "NaOH(aq)"##rarr##"NaCl(aq)" + "H"_2"O(l)"# The down arrow #darr# indicates the formation of a solid precipitate, and the up arrow #uarr# indicates the formation of a gas. You can also use the symbols #("s")# and #("g")#.

Naomi Aronson · Answer

undefined Double displacement reactions, also known as double replacement reactions or metathesis reactions, produce two new compounds as a result of the exchange of ions between two reactants. These reactions usually take place in aqueous solutions and can produce a precipitate, a gas, or a molecular compound, depending on the particular reactants involved.