Concept:Insoluble salts are made by precipitating them from solutions of two soluble salts.
Explanation:Two soluble salt solutions are mixed together.
Their ions exchange partners to form new compounds.
One of these new compounds is insoluble, so it appears as a solid precipitate.
This ionic exchange process is known as double decomposition or precipitation.
For example:
AgNO3(aq)+NaCl(aq)→AgCl(s)+NaNO3(aq)Here, silver chloride is insoluble and settles out.
Filtration only separates the precipitate; it does not create it.
Decomposition breaks a compound into simpler substances.
Neutralization forms soluble salts and water.
Hence, the common laboratory method is double decomposition.
Answer:D. double decomposition