The freezing point of a solution prepared by dissolving 126.3 mg of caffeine in 10.0 g of camphor is lower than that of pure camphor (Kf = 39.7°C/m) by 2.58°C. What is the molar mass of caffeine?

Q: Calculate the freezing point of a solution of 35.0 g methyl salicylate, C7H6O2, dissolved in 800. g…

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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: The freezing point of p-dichlorobenzene is 53.1 °C; its kf value is 7.10 °C/m.  A solution of 1.52 g…

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Q: When 0.279 g of a molecular compound, benzoic acid, was dissolved in 43.0 g of benzene, the freezing…

A: Depression in freezing point :-  When a nonvolatile solute is added to pure solvent then its…

Q: 5) Antifreeze is composed mainly of ethylene glycol (C2H6O2, d = 1.11 g/cm3). It is added to a car…

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Q: Calculate the freezing point of a solution of 40.0 g methyl salicylate, C 7H 6O 2, dissolved in 800.…

A:

Q: When 32.7 g of alanine (C3H,NO,) are dissolved in 500. g of a certain mystery liquid X, the freezing…

A:

Q: When 20.4 g of urea (CH₂N₂O) are dissolved in 500. g of a certain mystery liquid X, the freezing…

A: First of all we calculate the Kf of mystery liquid X using urea.For this purpose we use Following…

Q: The normal freezing point of water is 0.00 ⁰C.  What is the freezing point of a solution containing…

A: The magnitude of the freezing point depression produced by a solute is found to be proportional to…

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: Calculate the freezing point of a solution of 40.0 g methyl salicylate, C7H6O2, dissolved in 800. g…

A: Mass of methyl salicylate (solute) = 40 g Mass of benzene (solvent) = 800 g Kf = 5.10 ℃/m T°f = 5.50…

Q: 13.65 g of an unknown compound decreased the freezing point of 346 g of benzene (Kf= 5.12 ∘C  /m) by…

A: Given:: Mass of unknown = 13.65 g Molar mass = x = ? Kf= 5.12 ℃ m-1 Depression in freezing point ,…

Q: When 0.357 g of an unknown compound was dissolved in 60.0 g of benzene (MM: 78.11g/mol), the…

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Q: When 28.2 g of urea (CH4N₂O) are dissolved in 1150. g of a certain mystery liquid X, the freezing…

A: Given,mass of urea ( CH4N2O ) = 28.2 gmass of solvent 'X' = 1150. gchange in freezing point of urea…

Q: A 300 mg sample of caffeine was dissolved in 10.0 g of camphor (Kf = 39.7°C/m), decreasing the…

A: The depression in the freezing point (∆Tf) can be expressed as follows-

Q: The freezing point of a solution prepared by dissolving 125 mg of caffeine in 10.0g of camphor is…

A:

Q: A solution made by dissolving 150.0 g of an unknown compound in 320.0 mL of benzene to make a…

A: Density of benzene =  0.877 g/mL Volume of benzene = 320.0 mL Density = Mass / Volume so, Mass of…

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: When 258. g of alanine (C,H,NO,) are dissolved in 850. g of a certain mystery liquid X, the freezing…

A: Recall the following relation for depression of freezing point of a solution…

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: 17.55 g of an unknown compound decreased the freezing point of 138 g of benzene (Kf= 5.12 ∘C  /m) by…

A: Detail mathematical calculation is shown below

Q: When 73.6 g of glycine C2H5NO2 are dissolved in 1250. g of a certain mystery liquid X, the freezing…

A: Answer: Depression in freezing point of a solution containing a non-volatile solute is:…

Q: A student prepares a solution by dissolving 1.88 g of para-dichlorobenzene (C6H4Cl2, = 147.0 g/mol)…

A: Given; The given mass of C6H4Cl2, (Wb) = 1.88 g. The molar mass of C6H4Cl2, (Mb) = 147.0 g/mol. The…

Q: Calculate the vapor pressure above a solution prepared by dissolving 2.00 g of aspirin (C9H8O4) in…

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Q: Calculate the freezing point of a solution of 35.0 g methyl salicylate, C 7H 6O 2, dissolved in 800.…

A: Calculate the number of moles of methyl salicylate (C8H8O3): Calculate the molality of the…

Q: 19.45 g of an unknown compound decreased the freezing point of 303 g of benzene (Kf= 5.12 ∘C  /m) by…

A: We use the depression in freezing point equation.

Q: What is the molar mass of toluene if 0.85 g of toluene decreases the freezing point of 100. g of…

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

Q: Benzene is a common industrial solvent (molar mass: 78.11 g/mol). Its normal freezing point is 5.50…

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Q: A 6.06-gram sample of a compound is dissolved in 250. grams of benzene. The freezing point of this…

A: Given: The mass of the unknown compound dissolved in benzene = 6.06 g The mass of benzene = 250 g…

Q: What mass of naphthalene must be dissolved in 2.20 ×102 g of benzene to give a solution with a…

A: The required relationship is given below.

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

A:

Q: 10.A 7.85 g sample of a compound with empirical formula C:H4 is dissolved in 301 g of benzene. The…

A: This problem is based upon the depression in freezing point which is one of thecolligative property…

Q: Determine the freezing point depression of a solution that contains 30.7 g glycerin (C 3H 8O 3,…

A: Depression at the Freezing Point: A solution's freezing point is lower than that of the pure…

Q: The Tf of camphor is 179.80°C and it’s kf is 39.7°C/m. When 200.0 mg of a compound (X) are added to…

A: Given Information-  Tf of camphor = 179.80oC kf = 39.7oC/m mass of compound (X) = 20.00 mg = =…

Q: Calculate the molar mass of the unknown compound. (Use Kf=1.86∘C/m) An aqueous solution containing…

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.