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what is molal depression constant ? Does it depend on natureof the solute? |
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Answer» SOLUTION :` K_f ` =molal freezing POINT depression constant or cryoscopic constant. ` DELTA T_f =K_f m,` Where ` Delta T_f ` =depression in freezing point m= molality of the solution ` K_f ` = cryoscopic constant ` 1_fm,=1 Delta T_f =K_f` i.e. cryoscopic constant depends on the MOLAR concentration of the solute particles ,` K_f` is directly PROPORTIONAL to the molar concentration of the solute particles ` Delta T_f= (K_f xx W_B xx 1000 )/( M_B xx W_A ) ` ` W_B= ` mass of the solute `W_A `=mass of solvent `M_B ` =molecular mass of the solute. |
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