Given: Kb of water is 0.512 °C/m a. Calculate the molality of the resulting solution b. How many moles of the sample did he dissolve to perform the experiment? c. What is the molecular weight of the unknown sample?

Q: Determine the molal concentration of a sugar solution in water that has a freezing point of –2.1°C.…

A: Given information,    Freezing point = –2.1°C    Value of Kf = 1.86°C/m for water

Q: Now a solution is prepared by dissolving solid FeCl3 ( molar mass = 162.2 g/mol)in water. If the…

A: Given that:                 Mass percentage = 26.0 %                 Density of solution = 1.25 g/mL…

Q: Given the following data for: Mass of test tube, beaker, cyclohexane =100.17 g Mass of test tube…

A: Since, you have posted questions with multiple subparts we will solve the first three parts for you.…

Q: Calculate the molality of a 32.3% (by mass) aqueous solution of nitric acid. Calculate the molality…

A: Molality is equal to the number of moles of solute dissolve in per kg of solvent. It is denoted by…

Q: Calcium chloride, CaCl2, has been used to melt ice from roadways. Given that a solution is 30.%…

A: Calcium chloride, CaCl2, has been used to melt ice from roadways. Given that a solution is 30.0 %…

Q: The molal elevation constant for water is 0.512°C kg mol–. When 0.5 mole of sugar is dissolved in…

A: Boiling point is the point at which the vapour pressure of a solvent becomes equal to the…

Q: Ethanol is miscible with water. Assuming that caffeine is soluble in ethanol, could you use ethanol…

A: Let us assume that caffeine is soluble in ethanol

Q: 18) Predict the vapor pressure of a solution prepared by mixing 35.0 gram solid Na2SO4 (molar mass =…

A: The right answer is option B) 22.1 torr.

Q: Enthalpy of evaporation at normal boiling temperature 2253J/g, Calculate the boiling temperature at…

A: Calculation of molality of solution: m=wBMB×wA                                      ...... (1) where…

Q: A coolant mixture for the car radiator is prepared by mixing water and ethylene glycol, C2H4(OH)2.…

A:

Q: What is the boiling point elevation of a 0.055 m glucose in aqueous solution in ⁰C? Freezing point…

A:

Q: Calculate the mass of ethyleneglycol 1C2H6O22 that must be added to 1.00 kg of ethanol1C2H5OH2 to…

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Q: 1. Estimate the freezing and normal boiling points of 0.25 m aqueous solutions of NH4NO3 and NiCl3

A: Any solution's "boiling point (Tb)", as well as "freezing point(Tf)", is directly related to the…

Q: alculate the molality of a 0.898 M ethanol (C2H5OHC2H5OH) solution whose density is 0.429 g/ml.

A: Molality(m):It is defined as number of mole of solute dissolved in per  kilogram of solvent.…

Q: A 100. mL aqueous solution prepared by dissolving 25.0 g of a non-electrolyte solute had a freezing…

A: Given :  Kf = 1.86 °C/m  Freezing point of solution (Tf) = -1.26 °C  Mass of solute = 25.0 gm…

Q: solution is prepared by dissolving 104.1 grams of barium chloride, BaCl2 in 1000. grams of water?…

A: Depression in freezing point.

Q: Molality (m) is defined as moles of solute per _____ of _____.     kg; solution     L; solution…

A: There are various concentration terms for solution :-  Molarity  Normality  Mole fraction  %w/w…

Q: Calculate the vapor pressure of water  over the resulting solution when 45.8 g sugar (mw=342.296…

A: Density of water = 1 g/ml So, mass of water = volume x density = 150 ml x 1 g/ml =150 g Number of…

Q: After the addition of 24 g of ethanol (C2H5OH) to 1 kg of water, the freezing point of the solution…

A: Cryoscopic constant: It is the freezing point depression that is produced when the one mole of the…

Q: What was the purpose of measuring the freezing point of water? A. B. C. D. to assess the volume of…

A: The temperature at which any liquid changes to solid on cooling is known as its freezing point.  The…

Q: Calculate the freezing temperature of the following solution of 0.50 M sodium chloride (an ionic…

A: Introduction: Depression in Freezing point:                                The phenomenon by which…

Q: How does the solubility of a solid in a liquid depend on temperature? How is this temperature…

A: The solubility of a solid in a liquid generally increases with increase in temperature. When…

Q: The molality of an aqueous solution of sugar (C12H22O11) is 2.58 m. Calculate the mole fractions of…

A: 2.58 m - 2.58 of sugar present in 1 kg water. Molality = moles of soluteweight of solvent in kg 2.58…

Q: The lattice energy and heat of hydration for lithium hydroxide (LiOH) are -1021 kJ/mol and -1044.5…

A: Answer: Heat gained by solution will be: Q=mC∆T Here: Q=heat gainedm=mass of solutionC=heat capcity…

Q: Calculate the molality of a solution that is prepared by mixing 25.5 mL of CH3OH (d = 0.792 g/mL)…

A: The answer is given as follows

Q: The molal freezing point constant for water is 1.86 oC/m. At what temperature will a mixture of 2.00…

A: Given,  The mass of CaCl2 = 2.00 g.                            The mass of water = 25.0 g.…

Q: Calculate the molality of a 20.0% (by mass) aqueous solution of hydrochloric acid. A. 2.26 m B. 250…

A:

Q: What would be the theoretical freezing point of a solution made by dissolving 10.75 g of CoCl 2 in…

A: Since you have posted multiple questions, we will answer the first one for you. Kindly post the…

Q: HCl and NH3 react to form a white solid, NH4Cl. If cotton plugs saturated with aqueous solutions of…

A: HCl and NH3 forms NH4Cl.  Taking aqueous solution of HCl and NH4OH, HCl and NH3 gases are released…

Q: A solution is made using 280.0 g of H2O (molar mass= 18.02 g/mol) and 75.89 g of fructose C6H12O6…

A: Recall the following expression of molality       molality=moles of fructosemass of solvent waterin…

Q: What is the boiling point and freezing point of the solutions? Kb=0.512C*Kg Kf=1.186C*hg 1) 58.5…

A: Depression in freezing point and elevation in boiling point are both colligative properties. They…

Q: The solution contained 2.743 mg of protein in sufficient H2O to form 17.66 of solution The measured…

A: A numerical problem based on colligative property, which is to be accomplished.

Q: Sodium hydroxide is available commercially as 50.0% by weight aqueous solution. Calculate the…

A: The number of moles for a given chemical species refers to the ratio of mass of the species to that…

Q: Table sugar granules were dissolved in a glass of water. The solid sugar granules have no measurable…

A: Given, Vapour pressure of water: 23.8 torr Mole fraction of water in the solution: 0.75

Q: A solution contains equal amounts (in moles) of liquid components A and B. The vapor pressure of…

A: Since the solution contains equal moles of A and B, hence let the no. of moles of each component be…

Q: Table sugar granules were dissolved in a glass of water. The solid sugar granules have no measurable…

A: Given that -  Mole fraction of water, solvent = 0.75  Mole fraction of Solute = 1-0.75 = 0.25…

Q: You have a sucrose solution of 28°Brix or 28 grams of sugar per 100 grams solution in a ripe grape…

A:

Q: Safrole is used as a topical antiseptic. Calculate the vapor pressure of a solution prepared by…

A: The number of moles (n) of ethanol is calculated using equation (1),

Q: A constant pressure calorimeter contains 286 g of water at 20.0 °C. A 13.41 g of substance X (molar…

A: The heat released q = m*s*∆T where m = mass of water, s = specific heat, ∆T = temperature change

Q: What is the molality of the solution when 0.75 mol NaCl is dissolved in 1.23 kg water?   a. 0.095 m…

A: Molality - It is defined as the number of moles of solute per kilogram of solvent. Its SI unit is…

Q: Calculate the molalities of the following aqueous solutions: (a) 1.000 M sugar (C12H22O11) solution…

A: The molality of a solution is calculated using the below formula.

Q: The freezing point of an aqueous solution of barium nitrate is -2.65°C. Determine the apparent molal…

A: Given: Freezing point of solution = -2.65°C Freezing point of water = 0°C Molal freezing point…

Q: A 1.10 g sample of an unknown compound reduces the freezing point of 75.22 g benzene from 5.53 to…

A: Given: Mass of substance (solute) = 1.10 g mass of benzene (here solvent) = 75.22 g Initial…

Q: Solubility of glucose, C6H1206, in water is 120 g glucose / 100 g H2O at 30 °C. The following…

A: Solution (i) Mass of solution = 100 gm Mass of glucose = 45 gm Moles of glucose = weight / molar…

Q: During the cooling of the aqueous KNO3 solution, you will be asked to record the temperature when…

A:

Q: An aqueous solution of hydrochloric acid contains 36% HCl (molar  mass=36.46 g/mol) by mass. (a)…

A: concentration = 36% by mass of aqueous HCl solution solute: HCl solvent: water Required: mole…

Q: Calculate the molal concentration of a solution that contains 18 g of sodium hydroxide (NaOH) in 100…

A: Molal concentration =moles of solutemass of solvent = mass of solutemolar mass of solute x mass of…

Q: Complete the following table of an aqueous solution of potassium hydroxide  Density (g/ml)…

A: The molality and the mass percentage of the solute is calculated as shown below. Molarity M=1.13 mol…

Q: The freezing point of a 0.01 m aqueous solution of a nonvolatile electrolyte is -0.0720C. What is…

A: The freezing point, Tf , of 0.01 m solution is -0.072o C. As the solution is aqueous, that is the…