Find the freezing point (oC) for the new solution when 0.0080 mole of solute is added to 3.0 g of a pure solvent that has a freezing point at 60oC. The Kf for the pure solvent is 6.0 oC/m

Calculate the molality of chloride ions in an aqueous solution of magnesium chloride in which the mole fraction of magnesium chloride is 0.0250. b = m Calculate the molality of 6.35 g of sodium hydroxide dissolved in 325 g of water. b = m Calculate the molality for 1 L of a 2.50 M HCl aqueous solution that has a density of 1.0745 g · cm-3. b = m

When 1.504 g of solte is dissolved in 5.012 g of solvent (benzene), the solution freezes at -7.05 C.  THe pure solvent has a freezing point of 5.50C.  The Kf for the solvent is 5.12 C/m.  What is the molar mass of the solute?

Camphor is a white solid that melts at 179.50°C. It has been used to determine the molecular weights of organic compounds because of its unusually large freezing point-depression constant (39.7°C/m), which allows ordinary thermometers to be used. The organic compound is dissolved in camphor, and then the melting point of the solution is determined. If 1.17 g of an unknown compound is dissolved in 78.1 g camphor, the freezing point is found to be 177.35°C. What is the molecular weight of the unknown compound?

Consider the graph below that displays the solubility of KCI in water as a function of temperature. 50 g of KCI is mixed with 100 g of water at 25 °C and is then heated to 50 °C. Select which statement best describes what would be observed as the system proceeds to establish equilibrium. 100 Solubility (g per 100 g H₂O) 80 60 40 20 0 20 KCI 40 60 Temperature (°C) 80 100 O a. A homogeneous solution of hydrated ions is initially observed, when a further 10 g of KCI is added, some of the added KCI is observed to dissolve, but some of the additional KCI remains in solid form. O b. A heterogenous system involving an equilibrium between hydrated KCI ions and solid KCI is observed. O c. A homogeneous solution of hydrated ions is initially observed, when a further 1 g of KCI is added, this additional KCI is also observed to dissolve. O d. A homogeneous solution of hydrated ions is observed before spontaneous crystallisation of KCl occurs when the solution is poured onto a crystal of KCI.

Ice cubes from a freezer have a temperature of about -12°C (10°F), which is cold enough, but contact with the warmer ice cream mixture causes them to melt to liquid at 0°C, which is too warm. To obtain a liquid that is cold enough, salt (NaCl) is dissolved in water, and ice is added to the saltwater. The salt lowers the freezing point of the water enough so that it can freeze the liquid inside the ice cream maker. The instructions for an ice cream maker say to add one part salt to eight parts water (by mass). What is the freezing point of this solution (in degrees Celsius and degrees Fahrenheit)? Assume that the NaCl dissociates fully into ions, and that the solution is ideal.

A solution was made by mixing 6.25 g of heptane (C7H63, molar mass = 100.21 g/mol) with 46.2 g of chloroform (CHCl3, molar mass = 119.38 g/mol). This solution was found to freeze at -69.8 ℃. Calculate Kf for chloroform. The freezing point of pure chloroform is -63.5 ℃. List your answer to 2 decimal places.

The boiling point of an aqueous solution is 101.72 ∘C.101.72⁢ ∘C. What is the freezing point? Consult the table of colligative constants.

At what temperature do saturated solutions of sodium chloride and potassium chloride contain the same weight of solute per 100 mL of water?" 100 90 NANO 80 70 60 CaCl 50 KCI 40 NaC 30 20 KCIO, 10 Ce,(SO,) 0 10 20 30 40 50 60 70 80 90 100 Temperature ("C) Solubility (g of salt in 100 g H,0) ONkad

An online study examined the lowering of freezing point when 0.222 g of an unknown molecular solute was dissolved in 11.45 g of cyclohexane. The freezing point of pure cyclohexane was 6.6oC and the freezing point of the solution of the unknown was 3.3oC. The freezing point lowering constant, Kf, for cyclohexane is 20.0oC*(kg/mol). What is the molar mass of the unknown in g/mol? Enter your answer without units.