Question

What is the insoluble substance formed in a chemical reaction called?

Answer 1

Hint: A chemical reaction is a process that results in the chemical change of one set of chemical substances into another set of chemical substances. Chemical reactions are often defined as changes in the locations of electrons in the formation and breaking of chemical bonds between atoms, with no change in the nuclei (no change in the elements present), and may be represented using a chemical equation.

Complete answer:
Precipitation is a chemical process in which two ions bind together to produce an insoluble salt known as the precipitate in an aqueous solution. When two solutions containing different salts are mixed, a cation/anion pair produces an insoluble salt in the combined solution, which then precipitates out of solution. In the lab, observing precipitation reactions can help detect the presence of different ions in solution. When solid impurities separate from a solid phase, the concept of precipitation may be applied to various areas of chemistry, including solid phases.
The start of nucleation is a critical stage in the precipitation process. The development of a solid particle necessitates the establishment of a solution interface. The dissolution reaction free energy and the relative surface energy developed between the solid and the solution both influence energy changes. No precipitation happens if the energy changes aren't favourable, or if there aren't enough appropriate nucleation sites, and the solution remains supersaturated. Silver chloride is a classic example of a precipitation reaction in aqueous solution. The precipitation of a white solid is noticed when silver nitrate is introduced to a potassium chloride solution.
$$AgN{O}_3+KCl\to AgCl(\downarrow )+KN{O}_3$$

Note:
The development of precipitates can be used to determine the kind of cation in a salt. To do so, an alkali interacts with the unknown salt to form a precipitate that is the unknown salt's hydroxide. The colour of the precipitate and its excess solubility are used to identify the cation. Similar reactions are frequently employed in succession — for example, a barium nitrate solution will react with sulphate ions to create a solid barium sulphate precipitate, indicating the presence of sulphate ions.