Interpretation:
The osmotic pressure of
Concept Introduction:
By using the Osmometric method, the molar mass of solute can be calculated as follows:
Step-1: The observed osmotic pressure has to be converted into solute molar concentration,
Step-2: The amount of solute (in moles) in the solution is calculated by multiplying the molar concentration of solute by the volume of solution.
Step-3: The molar mass of the solute is calculated by dividing the given mass of solute (in grams) by the calculated amount in moles.
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Chapter 5 Solutions
CHEM PRINCIPLES LL W/ACHIEVE ONE-SEM
- For each of the following pairs of solutions, select the solution for which solute solubility is greatest. a. Ammonia gas in water with P = 1 atm and T = 50C Ammonia gas in water with P = 1 atm and T = 90C b. Carbon dioxide gas in water with P = 2 atm and T = 50C Carbon dioxide gas in water with P = 1 atm and T = 50C c. Table salt in water with P = 1 atm and T = 60C Table salt in water with P = 1 atm and T = 50C d. Table sugar in water with P = 2 atm and T = 40C Table sugar in water with P = 1 atm and T = 70Carrow_forwardWhat is the mole fraction of H 2 S O 4 in a solution containingthe percentage of sulfuric acid and water shownin Figure 14.25?arrow_forwardSimple acids such as formic acid, HCOOH, and acetic acid, CH3COOH, are very soluble in water; however, fatty acids such as stearic acid, CH3(CH2)16COOH, and palmitic acid, CH3(CH2)14COOH, are water-insoluble. Based on what you know about the solubility of alcohols, explain the solubility of these organic acids.arrow_forward
- For each of the following pairs of solutions, select the solution for which solute solubility is greatest. a. Oxygen gas in water with P = 1 atm and T = 10C Oxygen gas in water with P = 1 atm and T = 20C b. Nitrogen gas in water with P = 2 atm and T = 50C Nitrogen gas in water with P = 1 atm and T = 70C c. Table salt in water with P = 1 atm and T = 40C Table salt in water with P = 1 atm and T = 70C d. Table sugar in water with P = 3 atm and T = 30C Table sugar in water with P = 1 atm and T = 80Carrow_forwardPredict the results of passing a direct electrical current through (a) molten NaBr, (b) aqueous NaBr. and (c) aqueous SnCl2.arrow_forwardWhat mass (in g) of HCl is contained in 45.4 mL of an aqueous HCl solution that has a density of 1.084 g·cm−3 at 60°C and contains 21.11% HCl by mass?arrow_forward
- A certain liquid X has a normal freezing point of 3.30°C and a freezing point depression constant =Kf 5.91·°C·kgmol−1. Calculate the freezing point of a solution made of 9.69 g of benzamide (C7H7NO) dissolved in 400.g of X. Round you answer to 3 significant digits.arrow_forwardA certain liquid X has a normal freezing point of 3.00°C and a freezing point depression constant Kf=6.96·°C·kgmol−1. Calculate the freezing point of a solution made of 80.7 g of benzamide (C7H7NO) dissolved in 900.g of X. Round your answer to 3 significant digits.arrow_forwardA polymer sample of 4.1 g was dissolved in enough dichloromethane to form 0.100 L of solution. The osmotic pressure of this solution was found to be 1.21 kPa at 25°C. Calculate the molar mass of the polymer. Hint: Take "i "as 1.arrow_forward
- A certain liquid X has a normal freezing point of 7.00°C and a freezing point depression constant =Kf 7.41·°C·kgmol−1. A solution is prepared by dissolving some iron(III) chloride (FeCl3) in 700.g of X. This solution freezes at 3.5°C. Calculate the mass of FeCl3 that was dissolved. Be sure your answer is rounded to the correct number of significiant digits.arrow_forwardDistinguish between water quality and hydrochemistry.arrow_forwardA certain liquid X has a normal boiling point of 130.50°C and a boiling point elevation constant =Kb1.17·°C·kgmol−1 . A solution is prepared by dissolving some sodium chloride ( NaCl ) in 550.g of X . This solution boils at 131.7°C . Calculate the mass of NaCl that was dissolved.arrow_forward
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