Question

How is a precipitate evidence for a chemical reaction?​

Answer 1

A precipitate is evidence for a chemical reaction because it is a solid product that forms from a reaction and settles out of a liquid solution. It indicates that a chemical reaction has taken place. For example, when a colorless solution of lead (II) nitrate is mixed with a colorless solution of potassium iodide, a yellow solid precipitate called lead iodide is instantly formed. This color change and formation of a precipitate are visual clues that a chemical reaction has occurred.

Step-by-step explanation:

A precipitate is evidence for a chemical reaction because it is a solid product that forms from a reaction and settles out of a liquid solution. It indicates that a chemical reaction has taken place. For example, when a colorless solution of lead (II) nitrate is mixed with a colorless solution of potassium iodide, a yellow solid precipitate called lead iodide is instantly formed. This color change and formation of a precipitate are visual clues that a chemical reaction has occurred.

Answer 2

Formation of precipitate is usually an evidence of a chemical change. The precipitate is a new substance that gets created due a chemical reaction between two or more different substances. The precipitate can be the formation of a solid within a liquid or the formation of a solid within a solid due to a chemical reaction or change. The solid formation within a liquid is known as precipitate. This kind of chemical reaction can be seen in normal and daily life, as well as in laboratories.