SOLUBILITY OF DRUGS Sele£ted Dellnltlons •
Soludon: It is mixture of two or more components to form homogenous system.
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Solute: It is dissolved substance in solution.
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Solvent: It is the component which have ability to dissolve solute.
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Molarity: It is number of moles of a solute per liter of solution.
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Molality: It is Moles of solute in 1000 gm of solvent.
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Nonnality: It is number of Gram equivalent weights of solute in I !iter of solution at any given temperature.
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Mole fraction ot solute : It is the ratio of the number of moles of solute and the total number of moles of solute and solvent.
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Percentage by Weight(% w/w): It is defined as gm of solute in lOOgm of solution
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Percentage by Volume(%v/v): It is expressed as ml of solute in 100 ml of solution
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Percentage Weight 10 Volume (% w/v): It is expressed as gm of solute in 100 ml of solution
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Electrolyte: These substances when dissolved in water they undergo physical and chemical changes and generate ions in the solution.
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Non electrolyte: Substances that do not yield ions when dissolved.
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Saturated soludon : It is defined as a solution in which the solvent is in equilibrium with the solid phase or solute.
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Unsaturated soludon are those having the dissolved solute in a concentration below that necessary for complete saturation at a definite temperature.
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Supersaturated soludon : The solution which contains more of the dissolved solute than it would normally contain at a definite temperature.
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