6. Chemical Quantities & Aqueous Reactions

Osmolarity

Multiple Choice
0.302 grams of an antibiotic was dissolved in enough water at 23.6°C to make 500.0 mL of solution. The solution has an osmotic pressure of 8.34 mm Hg. What is the molar mass of the antibiotic?
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Open Question
Which of the following will have the highest concentration of potassium ion?
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Multiple Choice
Select the correct statement about osmolarity.
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Multiple Choice
Which of the following statements correctly describes the osmolarity of mammalian urine?
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Multiple Choice
Which ion is the greatest determinant of intracellular osmolarity and cell volume?
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Open Question
How many grams of CaCl₂ (molar mass = 111g/mol) are needed to prepare 100. mL of 0.100 M Cl⁻(aq) ions?
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Multiple Choice
0.0201 g of aspirin is dissolved in enough water to produce a 100.0 mL solution. The osmotic pressure of this solution is 0.0271 atm at 301 K. Aspirin has a van't Hoff factor of 1. Determine the molar mass of aspirin.
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Multiple Choice
Which term describes a solution that has the same solute concentration as another solution?
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Multiple Choice
What is the osmolarity of a 0.7 m KNO_3 solution, assuming complete dissociation?
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Open Question
What is the molarity of no3− in each solution?
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Multiple Choice
Dehydration can lead to ____________ blood osmolarity.
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Multiple Choice
Which of the following best describes osmolality?
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Open Question
What is the concentration of K⁺ in 0.15 M of K₂S?
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Multiple Choice
The high osmolarity of the renal medulla is maintained by which of the following?
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Multiple Choice
How many bromide ions are present in 65.5 mL of 0.210 M GaBr₃solution?

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