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CHEMISTRY: ATOMS FIRST VOL 1 W/CON...

14th Edition
Burdge
ISBN: 9781259327933

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CHEMISTRY: ATOMS FIRST VOL 1 W/CON...

14th Edition
Burdge
ISBN: 9781259327933
Interpretation Introduction

Interpretation:

For given solution vapor pressure lowering, freezing point depression, boiling point elevation and osmotic pressures to be calculated.

Concept introduction

Boiling point elevation (ΔTb) : Boiling point is the distinction between boiling point of the pure solvent ( Tb° ) and the boiling point of the solution ( Tb ).

ΔTb= Kbm

Where,

ΔTb= Change ib boiling pointTb= Boiling point of the solutionTb°= Boiling point of pure solvent

Freezing point depression (ΔTf) : Freezing point depression is the distinction between freezing point of the pure solvent (Tf°) and freezing point of the solution (Tf) .

ΔTf= Kfm

Where,

ΔTf= Change in freezing pointTf= Freezing point of the solutionTf°= Freezing point of pure solvent

Osmotic pressure is the pressure that is needed to stop osmosis. Osmotic pressure of the solution is directly proportional to the concentration of the solution.  We can calculate osmotic pressure by using this formula is given by,

osmotic pressure(π) = MRT

Where,

Vapor pressure lowering: Vapor pressure lowering is one of the colligative properties. Pure solvent has higher vapour pressure than its solution have non-volatile liquid.  Thus vapour pressure lowering guide boiling point elevation.

ΔP = χBA

Where,

χB- Mole fraction of the soluteP°C- vapor pressure of the pure solvent

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