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Surface tension of a solution of a surface active substance with concentration 0.056 mole/l at 293k is equal to 4.33.10^-2N/M. Cal

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Surface tension of a solution of a surface active substance with concentration 0.056 mole/l at 293k is equal to 4.33.10^-2N/M. Calculate adsorption of this substance from a solution with concentration 0.028 mole/ l at 293 k.surface tension of pure water is 7.28.10^-2NM

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Chapter- Factorisation of Polynomials
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A carpenter wants to manufacture a 3 metre ladder having rungs 25 cm apart. The rungs decreases uniformly in length from 45 cm at

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  1. Answer:

    Some typical surfactants

    Depending on their charge characteristics

    the surface-active molecules may be

    anionic, cationic, zwitterionic (ampholytic)

    or non-ionic. Examples of surfactants that

    are used in pharmaceutical formulation are

    as follows:

    Anionic surfactants: Sodium Lauryl

    Sulphate BP

    is a mixture of sodium alkyl sulfates, the chief of which is

    sodium dodecyl sulfate, C12 H25 SO4

    – Na+

    is very soluble in water at room temperature, and is used

    pharmaceutically as a preoperative skin cleaner, having

    bacteriostatic action against gram-positive bacteria, and also in

    medicated shampoos

    is a component of emulsifying wax.

    Explanation:

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