मराठी
महाराष्ट्र राज्य शिक्षण मंडळएचएससी विज्ञान (सामान्य) इयत्ता १२ वी

Write the SI unit of the cryoscopic constant. - Chemistry

Advertisements
Advertisements

प्रश्न

Write the SI unit of the cryoscopic constant.

Mention units of molal depression constant.

अति संक्षिप्त उत्तर
Advertisements

उत्तर

K kg mol–1, K molal–1 or °C molal–1

shaalaa.com
Relative Molecular Mass - Depression in Freezing Point
  या प्रश्नात किंवा उत्तरात काही त्रुटी आहे का?
2022-2023 (March) Official

संबंधित प्रश्‍न

An aqueous solution of urea freezes at –0.186°C, Kf for water = 1.86 K kg mol–1, Kb for water = 0.512 K kg mol–1. The boiling point of urea solution will be ______.


Ethylene glycol is used as an antifreeze agent. Calculate the amount of ethylene glycol to be added to 4 kg of water to prevent it from freezing at -6°C. (Kf for H2O = 1 .85 K mole-1 kg)


Why the freezing point depression (ΔTf) of 0.4 M NaCl solution is nearly twice than that of 0.4 M glucose solution?


Obtain the relationship between freezing point depression of a solution containing nonvolatile-nonelectrolyte solute and its molar mass.


A 5% aqueous solution (by mass) of cane sugar (molar mass 342 g mol-1) has a freezing point of 271 K. Calculate the freezing point of 5% aqueous glucose solution.


Freezing point depression constant of a solvent is _______.


What is a cryoscopic constant?


Calculate total moles after dissociation in 0.1 M KCl solution and 0.05 M aluminium sulphate solution. Hence, decide which of the two solutions will have higher freezing point depression.


Explain with vapour pressure-temperature curves that the freezing point of a solvent is lowered by dissolving a nonvolatile solute into it. Give reason for such lowering of freezing of solvent.


At the freezing point ______.


Derive the relation between freezing point depression and molar mass of solute.


Calculate the mass of ascorbic acid (molecular mass = 176 g/mol) that should be dissolved in 155 g of acetic acid to cause a depression of the freezing point by 1.15 K. Assume that ascorbic acid does not dissociate or associate in the solution. (Kf for acetic acid = 3.9 K kg/mol)


Ethylene glycol is used as an antifreeze agent. Calculate the amount of ethylene glycol to be added to four kilogram of water to prevent it from freezing at −6°C.

(Kf of water = 1.86 K kg mol-1 ) Assume that ethylene glycol (CH2OH.CH2OH) does not dissociate or associate in aqueous solution.


Which of the following solutions exhibits highest freezing point depression?


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×