Question

Example of a reaction in which change of state and formation of precipitate occur simultaneously

Answer 1

• One important class of chemical reactions is precipitation reactions. In such reactions, two different soluble salts (which are in aqueous solutions) combine to form two products.
• One of these products is insoluble in the solution and is precipitated out (and is, therefore, referred to as the 'precipitate').
• The example of precipitate reaction is as follows:
• An aqueous solution of potassium chloride KCl reacts with silver nitrate $AgN{O}_3$ solution an insoluble AgCl forms as a white substance.
• The chemical equation for the reaction is:

$KCl\left(aq\right)+AgN{O}_3\left(aq\right)\to AgCl\downarrow \left(s\right)+KN{O}_3\left(aq\right)$