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Micro Method Determination of Boiling Point of Glycerine (CAT#: STEM-PPA-0141-YJL)

Introduction

Glycerine, a clear, colourless, viscous, sweet-tasting liquid belongs to the alcohol family of organic compounds; molecular formula HOCH2CHOHCH2OH. The boiling points of glycerine (also called glycerin or glycerol) water mixtures are reduced with increased amounts of glycerine. <br />Glycerol has numerous uses. It is a basic ingredient in the gums and resins used to make many modern protective coatings such as automotive enamels and exterior house paints. Glycerol is a component of mono- and diglyceride emulsifiers, which are used as softening agents in baked goods, plasticizers in shortening, and stabilizers in ice cream.




Principle

The boiling point of a compound is the temperature at which it changes from a liquid to a gas under a certain pressure. This is a physical property often used to identify substances or to check the purity of the compound. Boiling point is the temperature at which the vapor pressure of the liquid exactly equals the pressure exerted on it, causing the liquid to "boil" or change to the gas phase. If the volume of the liquid is small, it is more advantageous to use the micro method.

Applications

Chemical industry

Procedure

1. Place the liquid is in a small test tube
2. Install the device
3. Heat
4. Remove the heat
5. Read the thermometer and record the temperature when the bubbles stop

Materials

• Sample Type: liquid