The boiling point of a solution containing a non-volatile solute can be expressed as follows:
Boiling point of solution = boiling point of pure solvent + boiling point elevation (ΔTb)
The elevation in boiling point (ΔTb) is proportional to the concentration of the solute in the solution. It can be calculated via the following equation.
ΔTb = i*Kb*m
Where,
i is the Van’t Hoff factorKb is the ebullioscopic constantm is the molality of the solute
It is important to note that this formula becomes less precise when the concentration of the solute is very high. Also, this formula doesn’t hold true for volatile solvents.
The ebullioscopic constant (Kb) is often expressed in terms of oC/molal or oC.kg.mol-1. The values of Kb for some common solvents are tabulated below.
SolventKb value (in oC.kg.mol-1)Water0.512Phenol3.04Acetic Acid3.07Chloroform3.63Benzene2.53
The degree of dissociation of the solute and the molar mass of the solute can be calculated with the help of the boiling point elevation formula.
Explanation:
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∆T in the base b =k.b
these is equation
Answer:
The boiling point of a solution containing a non-volatile solute can be expressed as follows:
Boiling point of solution = boiling point of pure solvent + boiling point elevation (ΔTb)
The elevation in boiling point (ΔTb) is proportional to the concentration of the solute in the solution. It can be calculated via the following equation.
ΔTb = i*Kb*m
Where,
i is the Van’t Hoff factorKb is the ebullioscopic constantm is the molality of the solute
It is important to note that this formula becomes less precise when the concentration of the solute is very high. Also, this formula doesn’t hold true for volatile solvents.
The ebullioscopic constant (Kb) is often expressed in terms of oC/molal or oC.kg.mol-1. The values of Kb for some common solvents are tabulated below.
SolventKb value (in oC.kg.mol-1)Water0.512Phenol3.04Acetic Acid3.07Chloroform3.63Benzene2.53
The degree of dissociation of the solute and the molar mass of the solute can be calculated with the help of the boiling point elevation formula.
Explanation:
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