Advertisements
Advertisements
Question
Derive the relation between the elevation of boiling point and molar mass of solute.
Advertisements
Solution
The elevation in the boiling point is given by the expression `Δ"T"_"b" = "K"_"b" ."m"` .....(1)
The molality is given by the expression m = `"W"_2/("M"_2 . "W"_1)` ...(2)
Substitute equation (2) in equation (1)
`Δ"T"_"b" = "K"_"b" . "W"_2/("M"_2 . "W"_1`
APPEARS IN
RELATED QUESTIONS
8 g of glucose, C6H12O6 (Molar Mass = 180 g mol−1) is dissolved in 1 kg of water in a sauce pan. At what temperature will this solution boil?
(Kb for water = 0.52 K kg mol−1, boiling point of pure water = 373.15 K)
Calculate the boiling point of solution when 4g of MgSO4 (M= 120 g mol-1) was dissolved in 100g of water, assuming MgSO4 undergoes complete ionization. (Kb for water = 0.52 K kgmol-1)
Why is elevation of boiling point a colligative property?
Boiling point of water at 750 mm Hg is 99.63°C. How much sucrose is to be added to 500 g of water such that it boils at 100°C? Molal elevation constant for water is 0.52 K kg mol−1.
Account for the following :
H2S has lower boiling point than H2O.
Account for the following :
H2S has lower boiling point than H2O.
Arrange the following increasing order of their boiling point:
CH3CH2OH, CH3CHO, CH3–O–CH3
Arrange the following in increasing order of boiling points:
(CH3)3 N, C2 H5 OH, C2 H5 NH2
Exactly 1 g of urea dissolved in 75 g of water gives a solution that boils at 100.114°C at 760 torrs. The molecular weight of urea is 60.1. The boiling point elevation constant for water is:
People add sodium chloride to water while boiling eggs. This is to ____________.
The molal elevation constant depends upon ____________.
Which of the following aqueous solutions should have the highest boiling point?
Which of the following has the lowest boiling point?
The unit of ebulioscopic constant is ______.
Explain why on addition of 1 mol of NaCl to 1 litre of water, the boiling point of water increases, while addition of 1 mol of methyl alcohol to one litre of water decreases its boiling point.
Why is it not possible to obtain pure ethanol by fractional distillation? What general name is given to binary mixtures which show deviation from Raoult’s law and whose components cannot be separated by fractional distillation. How many types of such mixtures are there?
Calculate the molal elevation constant for water given that 0.2 molal solution of non-volatile and non-electrolyte solute increases the boiling point of water by 0.104 K.
Molal elevation of boiling point constant is the elevation of boiling point produced by ______
Calculate the boiling point elevation for a solution prepared by adding 10 g of MgCl2 to 200 g of water, assuming MgCl2 is completely dissociated.
(Kb for Water = 0.512 K kg mol−1, Molar mass MgCl2 = 95 g mol−1)
