Concept explainers
(a)
Interpretation:
The solution that represents the higherboiling point is to be identified.
Concept introduction:
The colligative properties refer to those properties that are directly proportional to the number of particles. Thus these properties are only determined from the concentration and do not depend on the nature of the solute.
The depression in melting point, elevation in boiling point and osmotic pressure are some of the colligative properties that depend on the number of particles of solute.
(b)
Interpretation:
The solution that represents the higher meting point is to be identified.
Concept introduction:
The colligative properties refer to those properties that are directly proportional to the number of particles. Thus these properties are only determined from the concentration and do not depend on the nature of the solute.
The depression in melting point, elevation in boiling point, and osmotic pressure are some of the colligative properties that depend on the number of particles of solute.
(c)
Interpretation:
The solution that represents the higher osmotic pressure is to be identified.
Concept introduction:
The colligative properties refer to those properties that are directly proportional to the number of particles. Thus these properties are only determined from the concentration and do not depend on the nature of the solute.
The depression in melting point, elevation in boiling point, and osmotic pressure are some of the colligative properties that depend on the number of particles of solute.
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CONNECT IA GENERAL ORGANIC&BIO CHEMISTRY
- 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_forward6-21 Are mixtures of gases true solutions or heterogeneous mixtures? Explain.arrow_forwardA compound has a solubility in water of 250 mg/L at 25C. Should this compound be characterized as a soluble or insoluble compound at 25C?arrow_forward
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- A patient has a “cholesterol count” of 214. Like manyblood-chemistry measurements,this result is measured inunits of milligrams per deciliter (mgdL1). Determine the molar concentration of cholesterol inthis patient’s blood, taking the molar mass of cholesterolto be 386.64gmol1. Estimate the molality of cholesterol in the patient’sblood. If 214 is a typical cholesterol reading among men inthe United States, determine the volume of such bloodrequired to furnish 8.10 g of cholesterol.arrow_forward6-38 Describe how we would prepare 250 mL of 0.10 M NaOH from solid NaOH and water.arrow_forwardA pharmacist prepares an isotonic saline solution for intravenous infusion. Instead of preparing a 0.15 M solution, a 1.5 M solution is prepared. What would happen to the red blood cells if this erroneously prepared solution is infused?arrow_forward
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