Question 1.
A 2.700Ã10â2M solution of NaCl in water isat 20.0âC. The sample was created by dissolving a sample of NaCl inwater and then bringing the volume up to 1.000 L. It was determinedthat the volume of water needed to do this was 999.3 mL . Thedensity of water at 20.0âC is 0.9982 g/mL.
a.)Calculate the molality of the salt solution.
B.) Calculate the mole fraction of salt in this solution.
C.) Calculate the concentration of the salt solution in percentby mass.
D.) Calculate the concentration of the salt solution in partsper million.
Question 2.
Assuming complete dissociation of the solute, how many grams ofKNO3 must be added to 275 mL of water to produce a solution thatfreezes at â14.5 âC? The freezing point for pure water is 0.0 âCand Kf is equal to 1.86 âC/m.
Question 1.
A 2.700Ã10â2M solution of NaCl in water isat 20.0âC. The sample was created by dissolving a sample of NaCl inwater and then bringing the volume up to 1.000 L. It was determinedthat the volume of water needed to do this was 999.3 mL . Thedensity of water at 20.0âC is 0.9982 g/mL.
a.)Calculate the molality of the salt solution.
B.) Calculate the mole fraction of salt in this solution.
C.) Calculate the concentration of the salt solution in percentby mass.
D.) Calculate the concentration of the salt solution in partsper million.
Question 2.
Assuming complete dissociation of the solute, how many grams ofKNO3 must be added to 275 mL of water to produce a solution thatfreezes at â14.5 âC? The freezing point for pure water is 0.0 âCand Kf is equal to 1.86 âC/m.
Related textbook solutions
Basic Chemistry
Principles of Chemistry Molecular Approach
Chemistry: Structure and Properties
Principles of Chemistry Molecular Approach
Chemistry: A Molecular Approach
Chemistry: A Molecular Approach
Principles of Chemistry: A Molecular Approach
