Chemistry Practicals Class 12
Effectiveness of Different Oils in Forming Emulsions
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- In this simulation, you will experience a real-life scenario while doing the experiment.
- You will understand the terms colloids, emulsions, Tyndall effect and emulsifying agents.
- You will acquire skills required to perform the experiment using different oils.
- Performing this emulsification experiment in a chemistry virtual lab will make you understand the examples of water in oil emulsions.
- You will understand the effect of stabilizing agents in forming an emulsion of different oils.
- This emulsion formation simulation is significantly linked with micelle formation and the cleaning action of soap or detergent.
An emulsion is a colloidal system in which the dispersion phase and the dispersed medium (also known as the continuous phase) are in the form of liquids normally immiscible in nature. Two liquids can form different types of emulsion. For example, oil and water can form the first “oil in water” emulsion, in which the oil is the dispersed phase, and water is the dispersion medium. The second “water in oil” emulsion, in which the water is the dispersed phase and oil is the dispersion medium.
Emulsions can be obtained by vigorously agitating a mixture of both liquids. But these emulsions are thermodynamically unstable because the dispersed droplets simultaneously come together and form separate layers. The emulsions, therefore, need to be stabilized.
An emulsifying agent, also called an emulsifier, stabilizes the emulsion by lowering the interfacial tension between the two immiscible liquids. Soaps and detergents are the most commonly used emulsifiers. For example, soap molecules have a polar head and a non-polar hydrocarbon tail. The polar head is hydrophilic (water-loving) in nature, and the non-polar tail is hydrophobic (oil-loving).
When soap solution is added to an oil-in-water emulsion, the polar head dissolves in the water phase. The non-polar tail dissolves in the oil droplets by stabilizing the emulsion to form a micelle above the critical micelle concentration of the soap solution.
Watch this video to learn more about chemistry.
Requirements for this Science Experiment
⦁ Stopwatch ⦁ Stoppered Bottles ⦁ Measuring Cylinders ⦁ Beakers ⦁ Pipettes ⦁ Droppers