The melting point of pure benzene is 278.70K and Kf 4.90K/m. When 2.10g of an unknown solute is added to 50.0g of benzene, the freezing point of the solution is 277.60K. Determine the molecular weight of the unknown.

Q: An unknown sample weighing 5.06 g was dissolved in 307 g of ethanol (Kf = 2.0 K kg mol-1). The…

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Q: A 0.400-g sample of an unknown compound is dissolved in 20.0 mL of cyclohexane(density =…

A: Answer:

Q: 14. Certain compounds are known to “dimerize” in solution – this means that the intermolecular…

A: The depression in freezing point is given by  ΔTf = i * Kf * molality where ΔTf = depression in…

Q: What is the freezing point depression constan

A: Depression in freezing point is the result of adding a solute to a solvent.  When a substance starts…

Q: The normal freezing point of cyclohexane is 6.50 °C. A solution is prepared by dissolving 258.0 mg…

A: Here the solvent is cyclohexane whose Kf value is 20.0 oC/m, and the solute is the unknown…

Q: A solution made by dissolving 150.0 g of an unknown compound in 330.0 mL of benzene to make a…

A: The properties of solution that depend only on the concentration of the solute and is independent of…

Q: The freezing point of benzene, C6H6, is 5.500 °C at 1 atmosphere. Kf(benzene) = 5.12 °C/m In a…

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Q: Suppose that you add 25.6 g of an unknown molecular compound to 0.250 kg of benzene, which has a Kf…

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Q: TRUE OR FALSE: The property of the solution remains constant even if its composition varies.

A: Given statement is :  The property of the solution remains constant even if its composition varies…

Q: The freezing point of ethanol, CH3CH,OH, is -117.300 °C at 1 atmosphere. Kgethanol) = 1.99 °C/m In a…

A: Given: The freezing point of pure ethanol is -117.300°C. The freezing point depression constant of…

Q: 16. Consider two statements and state whether they are true or false: (1) If the enthalpy of…

A: Solvation depends on the solvation energy i.e. the change in Gibbs free energy, which expressed as…

Q: What is the total equilibrium vapor pressure of a benzene toluene solution if the mole fraction of…

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Q: Calculate the formal concentration in molarity of a sodium acetate solution prepared by diluting…

A: Using equation of dilution we can find final concentration of solution.

Q: What will be the molality of a 467mL of  0.48 M Ba(NO3)2 (MW= 261.34 g/mol) solution if the density…

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Q: Benzene CH, and toluene C, H, CH3 form an ideal solution. At 30 ° C, the saturated vapor pressure of…

A: We will use formula given by Raoult

Q: When 1.504 g of a solute is dissolved in 5.012 g of solvent (benzene), the solution freezes at -7.05…

A: Given: Mass of solute = 1.504 g Mass of solvent (Benzene) =5.012 g Freezing point of the solution…

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

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Q: When 8.45 g of a certain molecular compound X are dissolved in 35. g of formamide (NH₂COH), the…

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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: The freezing point of a solution that contains 1.00 g of an unknown compound is dissolved in 10.0 g…

A: Tf = (Freezing point of pure solvent) - (Freezing point of solution)Tf=(5.48 oC) - (2.07 oC) = 3.41…

Q: A mass of 1.3 g of an unknown solute is added to 10.7 benzene (Kf=5.12°C kg/mol). The freezing point…

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Q: Vapor pressure of pure H2O at 20℃ is 17.5 torr. What will be vapor pressure of solution after adding…

A: Vapor pressure of pure water = 17.5 torrMole fraction of water = 0.800Mole fraction of sugar = 0.200

Q: 40.0 °C/m. When 0.086 g of an organic substance of unknown molar mass is dissolved in 22.01 g of…

A: The fall in freezing point ∆Tf caused by the addition of solute to a solution is proportional to…

Q: When 27.5 g of a certain molecular compound X are dissolved in 90. g of benzonitrile (C6H₂CN), the…

A: Weight of unknown compound X = 27.5 g Weight of solvent benzonitrile = 90. g Molar mass of…

Q: 3. In a dilute aqueous solution of an unknown solute, MC1× (the anion is Cl¯, but the cation is…

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Q: The freezing point of lauric acid was lowered by 1.68°C when a 3.706 g sample of a nondissociating…

A: Solution- The freezing point depression (ΔTf) is given by the formula:  ΔTf = Kf × m × i where Kf is…

Q: Ba(NO3)2 + Na2CO3 → Mg(NO3)2 + K2CRO4 → Ca(NO3)2 + K2CrO4 → Sr(NO3)2 + K2CrO4→ -> Ba(NO3)2 + K2CRO4→

A: The incomplete Chemical Reaction can be completed as -  (1) When barium nitrate is treated with…

Q: The initial freezing temperature of 0.13 kg of a pure solvent is 6°C. 15.0 grams of a solute with…

A: Given: Freezing point of pure solvent = 6 oC Mass of solute added = 15.0 g Molar mass of solute =…

Q: When 1.504 g of solte is dissolved in 5.012 g of solvent (benzene), the solution freezes at -7.05 C.…

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Q: 1.812 grams of an unknown compound is dissolved into 77.7 grams of benzene, an organic solvent with…

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Q: Ice cubes from a freezer have a temperature of about -12°C (10°F), which is cold enough, but contact…

A: Det Tf=i ×Kf×m ion ,i for Nacl-->Na+ +Cl- i=2

Q: When 40.0 grams of an unknown compound are dissolved in 500. grams of benzene, the freezing point of…

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Q: 16.) An aqueous solution of a nonvolatile solute has a boiling point of 101.9°C. Calculate the…

A: Colligative properties: The colligative properties are those properties of solutions that depend on…

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: The solubility limit of a solute at 20. °C and 1.0 atm is 13.8 g of solute per 1 L of water. What…

A: The explanation is given below-

Q: In order to find the molar mass of an unknown compound, a research scientist prepared a solution of…

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Q: What is the freezing point (in K) of a solution made by dissolving 11.983g of CCl4 in 130.0 g of…

A: Given, Mass of CCl4 solute = 11.983 g Mass of benzene solvent = 130.0 g = 0.130 kg Freezing point of…

Q: Some unknown compound reduces the freezing point of benzene from 5.53 to 4.80˚C. What is the…

A: Molality of a solution can be defined as number of moles of solute dissolved per kilogram of solvent…

Q: What is the boiling point of a solution containing 0.80 g caffine C8H10N4O2, dissolved in 13.20 g…

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Q: A solution which is composed of heptane (C-H16, 100.198 g mol"") and octane (CH43, 114.224 g mol-)…

A: Given, The vapor pressure of the mixture of heptane and octane is------ 78 torr at 40oC. A saturated…

Q: PLEASE HELP WITH THIS CALCULATION: A solution was prepared by dissolving 2.0 g of material in 1500…

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Q: a) Calculate the freezing point of a solution containing 13.2 gg FeCl3FeCl3 in 156 gg water. b)…

A: Three numerical problems based on colligative properties, which are to be accomplished.

Q: The normal freezing point of ethanol (CH3CH₂OH) is -117.30 °C and its Kip value is 1.99 °C/m. A…

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Q: A 1.065 sample of an unknown substance is dissolved in 30g of benzene (Kf = 5.12 and Tf = 5.5ºC);…

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Q: When an unknown nonelectrolyte compound is dissolved in benzene (solvent), the freezing point of the…

A: Given that, Freezing point of solution Tf = 3.77 °C Freezing point of pure benzene Tf°= 5.44 °C…

Q: A solution contains 1.75 g of a non–volatile, non–electrolyte solute dissolved in 23.47g stearic…

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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: You make a solution composed of 156.8 g of acetic acid and 18.7 g of a mystery solute. If the…

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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.