The insoluble substance formed in a solution during a chemical reaction is known as _________?Asoluble saltBaqueous solutionCresidueDprecipitateAnswer: D. precipitate Read Explanation: A precipitate is an insoluble compound that is formed in a liquid solution by mixing two soluble salts together. The process that forms a precipitate is called precipitation. Precipitation refers to a chemical reaction that occurs when two ions bond together to create an insoluble salt. Read more in App