Advertisements
Advertisements
प्रश्न
Which solution has the lower freezing point? 10 g of methanol (CH3OH) in 100g g of water (or) 20 g of ethanol (C2H5OH) in 200 g of water.
उत्तर
∆Tf = Kf i.e
∆Tf α m
`"m"_("CH"_3-"OH") = (10/32)/0.1`
= 3.125 m
`"m"_("CH"_3-"OH") = (20/46)/0.2`
= 2.174 m
∴ Depression in freezing point is more in methanol solution and it will have lower freezing point.
APPEARS IN
संबंधित प्रश्न
The mass of a non – volatile solute (molar mass 80 g mol-1) should be dissolved in 92g of toluene to reduce its vapour pressure to 90% ______.
The observed depression in the freezing point of water for a particular solution is 0.093°C calculate the concentration of the solution in molality. Given that molal depression constant for water is 1.86 K Kg mol-1.
If two liquids A and B form minimum boiling azeotrope at some specific composition then ______.
Concentration terms such as mass percentage, ppm, mole fraction and molality are independent of temperature, however molarity is a function of temperature. Explain.
What is “semi permeable membrane”?
Explain the terms ideal and non-ideal solutions in the light of forces of interactions operating between molecules in liquid solutions.
Upon increase in pressure for dissociation N2O4 into NO2, equilibrium shift towards
On increase in pressure for dissociation ofN2O4 into NO2, equilibrium shift towards
Suggest the most important type of intermolecular attractive interaction in the following pair.
I2 and CCl4
Suggest the most important type of intermolecular attractive interaction in the following pair.
NaClO4 and water
