6. Chemical Quantities & Aqueous Reactions

Osmolarity

Open Question
What is the molar concentration of sodium ions in a 0.350 m Na₃PO₄ solution?
650
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Open Question
What is the molarity of cl− in each solution?
843
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Open Question
Which of the following will have the highest concentration of potassium ion?
692
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Open Question
What is the molarity of no3− in each solution?
1103
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Open Question
Which will have the highest concentration of potassium ion
644
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1
rank
Open Question
What is the concentration of K⁺ in 0.15 M of K₂S?
666
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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?
762
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Open Question
How many ions are present in a 25mL solution of 30mm (NH₄)₂CO₃?
604
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Open Question
What is the concentration of k+ ions in a 0.025 M K₂CO₃ solution assuming complete dissociation?
670
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Open Question
What is the concentration of Cl^– ions in a 0.1 M solution of calcium chloride?
545
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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.
274
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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?
277
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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?
222
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