Question

The peptizing agent used in Peptization is a/an:

Answer 1

Hint : We know that the Peptization is the method of producing stable colloids by using an electrolyte to break up precipitate and disperse it into the colloids. In this it is seen that Peptization utilizes the charges to produce colloids from the precipitate.

Complete Step By Step Answer:
Peptization is also known as deflocculation. It is a process which is responsible for the formation of colloids by breaking up or precipitating using an electrolyte. We can use an example of clay, which will normally form a precipitate if added to water but if we use sodium carbonate, it will act as a peptizing agent and hence allow clay to form a colloid with water. Now we will discuss the cause of Peptization. If we add an electrolyte to a freshly precipitated solution, the precipitate particles will adsorb on either the positive ion part or the negative ion part of the electrolyte. Due to this, the electrostatic repulsion force between the colloidal particles acts and the particle breaks and forms a colloidal mixture.
In order to perform Peptization we need an electrolyte, which is called a peptizing agent. The precipitate particles adsorb on the ions of the peptizing agent, and then electrostatic repulsion (it is the repulsion between two compounds with like charges) takes place, that causes the precipitate particles combine with the electrolyte ions to mix with the colloidal solution, and thereby forming a stable colloid.

Note :
Remember that peptisation is the process which is the main cause for the formation of colloidal particles in dispersion medium, and here peptizing agent is required for the completion of the process. It plays an important role for understanding various precipitation reactions that occur in aqueous solution.