(a)
Interpretation:
Osmotic pressure of
Concept introduction:
Osmotic pressure is calculated by below formula.
(1)
Here,
Answer to Problem 37QAP
Osmotic pressure of
Explanation of Solution
Given, Temperature
Convert temperature from Celsius to Kelvin as follows:
Substitute the values of T, M and R in equation (1).
Therefore, osmotic pressure of
(b)
Interpretation:
The osmotic pressure of
Concept introduction:
Expression of molarity of a solution is given below.
Osmotic pressure of the solution is as follows:
Here,
Answer to Problem 37QAP
Osmotic pressure of
Explanation of Solution
Given:
mass of urea
Volume of solution is
The conversion factor is
Use conversion factor to calculate moles of urea
Calculate molarity as follows:
Moles of solute ( n)
Put the above values in equation (2).
Osmotic pressure of the solution as follows:
(3)
Here,
Given, Temperature
Convert temperature from Celsius to Kelvin as follows:
Substitute the values of T, M and R in equation (3).
Therefore, osmotic pressure of
(c)
Interpretation:
The osmotic pressure of
Concept introduction:
Relationship between density, volume and mass is given below.
Answer to Problem 37QAP
Osmotic pressure of
Explanation of Solution
Given:
15.0 % urea by mass.
Density of solution = 1.12 g/mL.
Molar mass of urea
Given, mass
Therefore,
The conversion factor is
Use conversion factor to calculate moles of urea
The relationship between density, volume and mass is given below.
Put above values in (4).
Therefore, volume of the solution is
Calculate molarity as follows:
Moles of solute ( n)
Put the above values in equation (5).
Calculate osmotic pressure of the solution as follows:
Given, Temperature
Convert temperature from Celsius to Kelvin as follows:
Substitute the values of T, M and R in below expression.
Therefore, osmotic pressure of
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Chapter 10 Solutions
Chemistry: Principles and Reactions
- 6-111 As noted in Section 6-8C, the amount of external pressure that must be applied to a more concentrated solution to stop the passage of solvent molecules across a semipermeable membrane is known as the osmotic pressure The osmotic pressure obeys a law similar in form to the ideal gas law (discussed in Section 5-4), where Substituting for pressure and solving for osmotic pressures gives the following equation: RT MRT, where M is the concentration or molarity of the solution. (a) Determine the osmotic pressure at 25°C of a 0.0020 M sucrose (C12H22O11) solution. (b) Seawater contains 3.4 g of salts for every liter of solution. Assuming the solute consists entirely of NaCl (and complete dissociation of the NaCI salt), calculate the osmotic pressure of seawater at 25°C. (c) The average osmotic pressure of blood is 7.7 atm at 25°C. What concentration of glucose (C6H12O6) will be isotonic with blood? (d) Lysozyme is an enzyme that breaks bacterial cell walls. A solution containing 0.150 g of this enzyme in 210. mL of solution has an osmotic pressure of 0.953 torr at 25°C. What is the molar mass of lysozyme? (e) The osmotic pressure of an aqueous solution of a certain protein was measured in order to determine the protein's molar mass. The solution contained 3.50 mg of protein dissolved in sufficient water to form 5.00 mL of solution. The osmotic pressure of the solution at 25°C was found to be 1.54 torr. Calculate the molar mass of the protein.arrow_forwardWhat is the freezing point and normal boiling point of a solution made by adding 39 mL of acetone, C3H6O, to 225 mL of water? The densities of acetone and water are 0.790 g/cm3 and 1.00 g/cm3, respectively.arrow_forwardThe osmotic pressure of a solution containing 7.0 g of insulin per liter is 23 torr at 25 C. What is the molar mass of insulin?arrow_forward
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