The freezing point depression
∆T = KF·m
where KF is the molal freezing point depression constant and m is the molality of the solute. Rearrangement gives: mol solute = (m) x (kg solvent) where kg of solvent is the mass of the solvent (lauric acid) in the mixture. This gives the moles of the solute.
What determines the freezing point of a substance?
You can say that
intermolecular forces of a liquid
are directly proportional to its freezing point. … Typically, pressure lower than 1atm reduces the temperature at which the substance freezes. But in the case of water, the higher the pressure, lower is the freezing point.
How do you determine the freezing and boiling point of a solution?
Multiply the original molality (m) of the solution by the number of particles formed when the solution dissolves
. This will give you the total concentration of particles dissolved. Compare these values. The higher total concentration will result in a higher boiling point and a lower freezing point.
What is the minimum freezing point?
Freezing-point depression is what causes sea water, (a mixture of salt and other compounds in water), to remain liquid at temperatures below
0 °C (32 °F)
, the freezing point of pure water.
What is freezing point and boiling point?
It is based on molecular motion, with the temperature of 0 K, also known as absolute zero, being the point where all molecular motion ceases. The freezing point of water on the Kelvin scale
Which has maximum freezing point?
Value of van't Hoff factor is least for
urea solution
, so there will be least depression in freezing point i.e. maximum freezing point.
Which gas has minimum freezing point?
That's due to the fact that
Helium
has the lowest boiling and freezing points of any other known substance. Helium happens to be the only element that can't be solidified or frozen at normal atmospheric pressure. Only once you apply a pressure of 25 atmospheres at Helium's freezing point of −458 °F can you solidify it.
Which aqueous solution is minimum freezing point?
The aqueous solution of
0.01M NaCl
has a minimum freezing point.
What is normal freezing point?
noun Physical Chemistry. the temperature at which a liquid freezes: The freezing point of water is
32°F, 0°C
.
Does higher boiling point mean lower freezing point?
In fact, as the boiling point of a solvent increases,
its freezing point decreases
. … The solute (salt) reduces the freezing point of the ice, which allows the ice to melt at a lower temperature.
What is the normal freezing point of water?
The freezing point at which water — a liquid — turns to ice — a solid — is
32°F (0°C)
.
Which has highest freezing point at 1 atm?
As [FeC{l_3}] solution comprises the maximum number of solute particles, its freezing point will be the lowest and
sugar solution
comprises the minimum number of solute particles so its freezing point will be the highest. So, the correct answer is Option B.
Which aqueous solution has maximum freezing point?
We can see that lowest depression in freezing point is of 0.005M C2H5OH as it has least effective particle concentration. Since it has least depression, it has maximum freezing point. ◾️So, the correct answer is option (
b
).
Which one will exhibit the largest freezing point depression?
Hence,
Al2(SO4)3
will exhibit largest freezing point depression due to the highest value of i.
Which of the following solutions has the minimum freezing point?
0.01 molal NaCl solution
have minimum freezing point because its molality is more and it given two ions after dissociation of one molecule.
