Question
Download Solution PDFWhich of the following is a soapy liquid with large molecular size of the order of 10–9 m?
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFThe correct answer is Oleic acid.
Key Points
- Oleic acid is a monounsaturated fatty acid with a large molecular size, approximately 10-9 meters, enabling it to form a soapy liquid.
- It is commonly found in vegetable oils such as olive oil and is known for its amphiphilic nature, meaning it has both hydrophilic and hydrophobic properties.
- The amphiphilic structure of oleic acid allows it to act as a surfactant, reducing surface tension and forming micelles in water.
- Oleic acid is widely used in soaps, detergents, and emulsifiers due to its ability to stabilize mixtures of oil and water.
- Its molecular size and properties make it suitable for applications in industries like cosmetics, pharmaceuticals, and food production.
Additional Information
- Fatty Acids:
- Fatty acids are carboxylic acids with long hydrocarbon chains that may be saturated or unsaturated.
- Saturated fatty acids like palmitic acid have no double bonds, while unsaturated fatty acids like oleic acid have one or more double bonds.
- The molecular size and structure of fatty acids influence their physical and chemical properties.
- Surfactants:
- Surfactants are compounds that lower the surface tension between two substances, such as oil and water.
- They are commonly used in cleaning products, emulsifiers, and foaming agents.
- Oleic acid acts as a surfactant due to its amphiphilic nature.
- Micelles:
- Micelles are spherical structures formed when amphiphilic molecules like oleic acid aggregate in water.
- They play a key role in the cleansing properties of soaps and detergents.
- Micelles trap oil and dirt, making them water-soluble for easy removal during washing.
- Applications of Oleic Acid:
- It is widely used in the cosmetic industry for formulations like moisturizers and lotions.
- In the pharmaceutical industry, oleic acid is used as a solvent and emulsifier in drug formulations.
- It is also utilized in the food industry as a component of cooking oils and flavoring agents.
Last updated on Dec 9, 2024
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