Chemical Identification Is Sudan Black a suitable material t

Chemical Identification Is Sudan Black a suitable material to use for the chemical identification of lip.ds such oil? Why? Emulsification How does the addition of the detergent affect the dispersal of oil in the water? What is the action of the emulsifier (detergent)? What is the general definition of an emulsion? Name at least two other common emulsifiers encountered in the household.

Solution

B. Yes, Sudan Black is a suitable material to use for the chemical identification of lipids such as oil because Sudan black is soluble in oil and it will stain the oil.

C.

1.Oil usually floats in water as a layer.So,the addition of detergent breaks oil into smaller drops as a result of which oil cannot form a layer on the water and it will mix with water.

2.An emulsifier is made up of two parts : a water soluble or hydrophilic part and an oil soluble or lipophilic part.The action of emulsifier is to bring about emulsification process.For example when an emulsifier is added to a mixture of water and oil it arranges itself on the interface by attaching to water through its hydrophilic part at one end and to oil through its lipophilic part at the other end.This reduces the interfacial tension and therefore the force required to separate the oil and water weakens.This allows oil and water to get mixed together.

3.Emulsion can be defined as a mixture of two or more liquids that do not mix with each other or are insoluble.

4.Two other common emulsifiers used in household are egg yolk and glycerol.