0
A solute depresses the freezing point of a solution because the solute can not fit perfectly into the crystal lattice of the solid solvent. The normal crystal lattice is the lowest energy arrangement of the molecules or ions of the solid solvent. Therefore, the disordered lattice of a solvent freezing in the presence of a solute has at least slightly higher energy than the lattice of a solid pure solvent and requires at least a slightly lower temperature to solidify.
What else can I help you with?
What is the freezing point of an aqueous solution if the boiling point of an aqueous solution is 101.34 degree Celsius?
The freezing point of an aqueous solution will be lower than 0°C (32°F) if the boiling point is elevated above 100°C. The freezing point depression is a colligative property dependent on the concentration of solute particles in the solution. To determine the specific freezing point, more information on the solute and its concentration is required.
The freezing point of a solution containing 4.12 g of unknown solute in 100 grams of camphor is 166.2 degrees C what is the freezing point depression?
The freezing point depression can be calculated using the formula: ΔTf = Kf * m, where ΔTf is the freezing point depression, Kf is the cryoscopic constant for the solvent (camphor), and m is the molality of the solution. Given that the freezing point of pure camphor is 178.4°C, the freezing point depression is 178.4°C - 166.2°C = 12.2°C. We need to first calculate the molality of the solution using the formula: molality (m) = moles of solute / kg of solvent. First, convert the mass of the solute (4.12 g) to moles, then calculate the molality. Once you have the molality, you can substitute it along with the freezing point depression into the formula to find the cryoscopic constant Kf.
Compared to the pure water an aqueous solution of calcium chloride has a?
Higher boiling point and a lower freezing point. These are called colligative properties. When a solute is put into solution with the solvent, there is a change in the vapor pressure, osmotic pressure, elevation of the boiling point, and depression of the freezing point.
When compared to pure water what will a 0.5 M solution of potassium chloride have a. lower boiling point b. lower freezing point c. higher capor pressure d. lower osmotic pressure?
b. lower freezing point A 0.5 M solution of potassium chloride will have a lower freezing point compared to pure water due to the presence of solute particles which disrupt the formation of ice crystals.
What is the solution's freezing point depression?
To solve freezing point depression problems, you need to know the following things:-- the identity of the solute (the thing you are adding to the liquid)-- the identity of the solvent (the liquid)-- whether the solute is molecular or ionic, and if ionic, how many ions it forms-- the amount of solute (in grams or moles)-- the amount of solvent (in kilograms)-- the value of Kf of the solvent (for water, it is -1.858 K·kg/mol (or -1.858 °C molal-1)Then you use the following equation:∆T = i * Kf * mwhere ∆T is the change in the freezing point, "i" is the number of molecules or ions formed upon addition to the solvent, Kf is the freezing point depression constant, and "m" is the molality of the solution.The Kf of water for a freezing point depression is known and is equal to -1.858 °C·kg/mol (or -1.858 °C molal-1)The value of "i" has to do with what you add to the water. If you added sugar, a molecular compound the value of "i" is 1.0. If you add a ionic compound like NaCl, the value of "i" is 2.0 because for every 1 molecule of NaCl, you make 2 ions: one Na+ and one Cl- in water. For MgCl2, the value of "i" is thus 3.0 (for each MgCl2 you get one Mg2+ and two Cl- ions, so a total of 3 ions).To find "m," the molality of a solution you need to know the number of moles of solute and the number of kilograms of solvent (m = moles/kg). If you are given the number of grams of solute, the number of moles is found from the mass and the molar mass of the solute.grams of solute ÷ molar mass of solute = moles of soluteTo find the molality, just divide the moles of solute by the kilograms of solvent moles of solute ÷ kilograms solvent = molality Note: If you are given the volume of the solvent instead of the mass, use the density of the solvent to convert -- the density of water is 1 kilogram per liter)Liters of solvent * density of solvent = kilograms of solventNow just plug all the numbers into the equation at the top of the answer!
What effect does a solute have on the freezing point of a solvent?
Adding a solute to a solvent results in the freezing point of the solution decreasing compared to the pure solvent. This is due to the solute molecules disrupting the formation of regular solvent crystal structures, which lowers the freezing point of the solution.
When a solute is added to solvent the freezing point of the solution is?
The freezing point is lowered.
What information is most useful to determine the solution that has a lower freezing point?
To determine which solution has a lower freezing point, you need the concentrations of solute in each solution and their respective properties (molal freezing point depression constants). The solution with the higher concentration of solute and lower molal freezing point depression constant will have the lower freezing point.
What is the relationship between solute concentration and the freezing point elevation of a solution?
The relationship between solute concentration and the freezing point elevation of a solution is that as the concentration of solute increases, the freezing point of the solution decreases. This is because the presence of solute particles disrupts the formation of the crystal lattice structure of the solvent, causing the freezing point to be lower than that of the pure solvent.
How can the freezing point depression method be used to calculate the molar mass of a solute in a solution?
The freezing point depression method can be used to calculate the molar mass of a solute in a solution by measuring the decrease in the freezing point of the solvent when the solute is added. By knowing the freezing point depression constant of the solvent and the amount of solute added, the molar mass of the solute can be calculated using the formula: molar mass (freezing point depression constant molality) / freezing point depression.
The depression of the freezing point is dependent on?
The depression of the freezing point is dependent on the concentration of solute particles in a solution. More solute particles lead to a greater depression of the freezing point.
What is the freezing point of an aqueous 2.85 m sodium hydroxide (NaOH) solution?
The freezing point of a 2.85 m sodium hydroxide (NaOH) solution would be lower than 0°C due to the presence of the solute particles, which depress the freezing point of water. The exact freezing point depression can be calculated using the formula: ΔTf = i * Kf * molality, where i is the van't Hoff factor, Kf is the cryoscopic constant, and molality is the concentration of the solution in moles of solute per kilogram of solvent.
What is the relationship between boiling point elevation and freezing point depression in a solution?
Boiling point elevation and freezing point depression are both colligative properties of a solution. Boiling point elevation occurs when the boiling point of a solvent increases when a solute is added, while freezing point depression happens when the freezing point of a solvent decreases with the addition of a solute. These phenomena are related because they both depend on the concentration of solute particles in the solution, with boiling point elevation and freezing point depression being proportional to the number of solute particles present.
What effect does adding solute have on the freezing point of a solution?
the temperature at which the solution freezes is lowered.
What effect does adding a solute have on freezing point on a solution?
the temperature at which the solution freezes is lowered.
When a solute is added to a solvent the freezing point of solutions is?
The freezing point is lowered.
When a solute is added to a solvent the freezing point of the solution is?
lowered. This is known as freezing point depression, where the presence of the solute disrupts the formation of regular solvent-solvent interactions, reducing the freezing point of the solution compared to the pure solvent.
