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6. Chemical Quantities & Aqueous Reactions

Osmolarity

6. Chemical Quantities & Aqueous Reactions

Osmolarity

Open Question
How many ions are present in a 25mL solution of 30mm (NH₄)₂CO₃?
Open Question
What is the concentration of k+ ions in a 0.025 M K₂CO₃ solution assuming complete dissociation?
Open Question
What is the concentration of Cl^– ions in a 0.1 M solution of calcium chloride?
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.
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?
Multiple Choice
A 2.26 g sample of a protein of unknown molecular weight was dissolved in enough water to produce 21.3 mL of solution. The solution was found to have an osmotic pressure of 2.45 torr at 25 °C. What is the molecular weight of the protein?