Question

What is Kraft temperature ?

Answer 1

Hint: We also know that temperature is one of the important parameters in chemistry. There are three units for measure the temperature. There are degree Celsius, kelvin and Fahrenheit. Exothermic and endothermic reactions are based on temperature. If temperature of the reaction decreases, that reaction is called as endothermic reaction. If temperature of the reaction increases, that reaction is called as exothermic reaction.

Complete answer:
As we know that the Kraft temperature is one kind of temperature in surface chemistry. Kraft temperature is nothing but the temperature of the solubility of surfactant is same or equal to the surfactant CMC. The abbreviation of the CMC is critical micelle concentration.
In other ways we can explain, Kraft temperature is nothing but the minimum temperature required for the formation of micelles in that surfactant takes place. In surface chemistry wise, micelles are formed above this temperature. In surface chemistry wise, micelles are not able to form in this Kraft temperature.

Note:
We have to know that Kraft temperature was first named by German chemist Friedrich Kraft. If Kraft temperature decreases, the maximum solubility of the surfactant is also lower than the critical micelle concentration. That means micelles will not be able to form.
Kraft temperature is also used in phase change of surfactant. We can predict Below the Kraft temperature which surfactant remains in solid form even in solvent. The cloud point of temperature and Kraft temperature are also visually similar. Because, due to the flocculation, surfactants in the solution become cloudy or opaque in nature. In general, surfactants are made up of a long chain of hydrocarbon atoms and a polar head group. Increasing the length of the chain of hydrocarbon atoms the Kraft temperature also increases. Because the Kraft temperature also improves or increases van der Waals force.