Students are investigating a solvent for use in freezing point depression experiments. They measured the freezing point of the solvent as −12.6 ⁰C. The solution they made by dissolving 0.484 g of ethanol (46.07 g/mol) in 8.254 g of the solvent has a freezing point of -18.3 ⁰C.  Determine the freezing point depression constant, Kf, for the solvent.

Q: A researcher prepares a new compound and uses freezing point depression measurements to determine…

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Q: Calculate the freezing point of a solution made by dissolving 1.00 mole of NaCl in 1000. g of H2O.

A: We will use formula of ∆Tf. ∆Tf=Tf°-Tf

Q: A solution that contains 18.467 g sucrose (table sugar, C12H22O11) and 45.61 mL of water freezes at…

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Q: Students are investigating a solvent for use in freezing point depression experiments. They measured…

A: Given : Freezing point of solvent = -12.6 oC Freezing point of solution = -18.3 oC Mass of solute…

Q: The normal freezing point of a certain liquid X is -0.70 °C, but when 19. g of sodium chloride…

A: Given ,Normal freezing point of certain liquid, X Mass of NaCI = 19. gMass of X = 850. gObjective…

Q: Determine the freezing point of a solution consisting of 0.350 m KCl in water. The freezing point…

A: Cryoscopic constant of water is 1.86oC/molal Van’t Hoff factor (i) is 2 since each KCl give on one…

Q: Students are investigating a solvent for use in freezing point depression experiments. They measured…

A: Depression in freezing point  (∆Tf) :- When a non volatile solute is added to a pure solvent it's…

Q: Determine the freezing point of a solution consisting of 0.350 m KCl in water. The freezing point…

A: Given Data: The molarity of the solution is 0.350 m. The value of Kf, of water is 1.86 °C/m. The…

Q: Assuming 100% dissociation in aqueous solution, calculate the freezing point of a solution made by…

A: It is given that there is 100 % dissociation of NaCl in the solution. Mass of NaCl = 16.94 g The…

Q: Calculate the freezing point (in ºC) of a solution made by dissolving 4.29 g of ethylene…

A: Given :-  Mass of ethylene glycol = 4.29 g  Mass of water = 28.3 g  Kf for solvent = 1.86 K/m…

Q: The freezing point of 50.40 g of a pure solvent is measured to be 47.46 ºC. When 2.10 g of an…

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Q: A 3.40-g sample of a mixture of naphthalene (C₁₀H₈) and pyrene (C₁₆H₁₀) is dissolved in 35.0 g…

A: Molar Mass of napthalene (C10H8) = 128 g/mol Molar mass of pyrene (C16H10) = 202 g/mol Mass of…

Q: Quinine is a natural product extracted from the bark of the cinchona tree, which is native to South…

A: The expression for freezing point depression due to the addition of a non-volatile solute in a…

Q: A chemist wants to determine the molar mass of a naturally occurring substance isolated from…

A: Given information:Mass of solute = 5.431 gMass of acetone = 25.00 gVapor pressure of solution (P) =…

Q: When  238.   mg  of a certain molecular compound X are dissolved in  90.0   g  of benzonitrile…

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Q: Calculate the freezing point of a solution made by adding 16.43 g of a nonelectrolyte (125.5 g/mol)…

A: Molality is the number of solvent moles per kilogram.Molality is also known as molal concentration.…

Q: 6.50

A: Dear student I have given answer to your question in the image format.

Q: A certain liquid (A) has a normal boiling point of 127.80°C and a boiling point elevation constant…

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Q: Students are investigating a solvent for use in freezing point depression experiments. They measured…

A: On adding non-volatile solute to pure solvent, the freezing    point of the solution becomes…

Q: A researcher prepares a new compound and uses freezing point depression measurements to determine…

A: Given,  Mass of the compound (w) =  1.966 g Mass of cyclohexane (W) = 75.00 g Freezing point of…

Q: The freezing point of a liquid will change when a solute is added. Explain how the addition of salt…

A: When a solute is dissolved in the water, the vapor pressure of the solution is lower than the pure…

Q: the freezing point of the solution be?  Calculation sheet attached.

A: Given: The melting (freezing point) point of carbon disulfide = -111.5 deg C. The freezing point…

Q: 4. A compound contains 42.9% C, 2.4% H, 16.6% N, and 38.1% O by mass. The addition of 3.16 g of this…

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Q: The freezing point of 48.06 g of a pure solvent is measured to be 45.44 ºC. When 2.04 g of an…

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Q: 3.92 g of a non-electrolyte compound are dissolved in 400. g of liquid benzene. The freezing point…

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Q: freezing point of 57.08 g of a pure solvent is measured to be 50.83 ºC. When 2.86 g of an unknown…

A: Given -> Weight of solvent= 57.08 gm = 0.05708 kg (1kg=1000g) Freezing point of pure solvent =…

Q: The freezing point of 58.53 g of a pure solvent is measured to be 44.17 ºC. When 2.15 g of an…

A: We are given with a data for the depression in freezing point on adding a solute to a pure solvent…

Q: When 168 mg of a certain molecular compound X are dissolved in 25.0 g of cyclohexane, the freezing…

A: Solution -

Q: A 3.40-g sample of a mixture of naphthalene (C₁₀H₈) and pyrene (C₁₆H₁₀) is dissolved in 35.0 g…

A: Assuming mass of naphthalene in the mixture is y. Hence mass of pyrene = mass of mixture - mass of…

Q: An online study examined the lowering of freezing point when 0.222 g of an unknown molecular solute…

A: Mass of in known compound ,m = 0.222g Let the molar mass of compound be M g/mol. Then, number of…

Q: A solution made by dissolving 150.0 g of an unknown compound in 375.0 mL of benzene to make a…

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Q: 15.2 g of camphor dissolved in naphthalene lower the freezing temperature of naphthalene from 80.0…

A: Given: Mass of camphor=15.2 g Molar mass of camphor=152 g/mol Lowered freezing point of…

Q: A student prepares a solution by dissolving 2.09 g of para-dichlorobenzene (C6H4Cl2,= 147.0 g/mol)…

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Q: The freezing point of 59.49 g of a pure solvent is measured to be 44.96 ºC. When 2.18 g of an…

A: Freezing point of the liquid is the temperature at which the vapor pressure of the solvent in the…

Q: You are a forensic chemist and vou are given a white powder to analyze. You take a 0.25- g sample of…

A: Given that 0.25 g of a sample is dissolved in 4.0 g of a benzene.Freezing point of the solution is…

Q: A certain liquid X has a normal freezing point of −6.30°C and a freezing point depression constant…

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Q: The freezing point of a liquid will change when a solute is added. Explain how the addition of salt…

A: Given: Freezing point of water = 0.0 oC molality of CaCl2 solution = 2.80 m Van`t Hoff factor of…

Q: The molal freezing point depression constant =Kf·7.96°C·kgmol−1 for a certain substance X. When…

A: Answer: We will calculate the depression in freezing point using following formula:…

Q: A 12.7 g substance was dissolved in 2.00 g of solvent. The molar mass of the unknown substance is…

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Q: Determine the freezing point of a solution consisting of 0.350 m KCl in water. The freezing point…

A:

Q: Why is a large freezing point depression constant (Kf) advantageous when determining freezing point…

A: As we know, ∆Tf=Kf×m when determining freezing point depression, a large freezing point depression…

Q: A solution that contains 5.50 g of ferrocene [a non-electrolyte, molar mass = 186.0 g/mol] dissolved…

A: Given data, Mass of ferrocene = 5.50 g Molar mass = 186.0 g/mol Mass of solvent = 75.0 g = 0.075 Kg…

Q: Camphor is a white solid that melts at 179.50°C. It has been used to determine the molecular weights…

A: given mass of unknown compound (solute) = 1.08 g Kf  = 39.7°C/m Mass of solvent = 73.6 g = 73.6×10-3…

Q: The freezing point of 57.08 g of a pure solvent is measured to be 50.83 ºC. When 2.86 g of an…

A:

Solutions

Solutions can be considered as homogeneous mixtures which contain two or more than two chemical substances. The chemical substance which is the greater part is defined as solvent. And the chemical substance that is dissolved in a solvent is referred to as solute. Solution chemistry plays an important role in chemistry since it supports many commercial applications of solutions.