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- Mar 17, 2010
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there are two questions that both relate here one of the questions here says that
as temperature increases density will decrease as the volume of the solution will increase...im all good here
Then a question in the same passage asks
Which solution has the HIGHEST boiling point? (side note molar mass of MX < MY)
A. 1.0 grams MX with 10 mL water at 25 C
B. 1.0 grams MY with 10 mL water at 25 C
C. 1.0 grams MX with 10 mL water at 50 C
D. 1.0 grams MX with 10 mL water at 50 C
Answer: C
"the solution with the highest boiling point is the solution with the highest molality of impurities. Molality is defined as moles solute per kg solvent. MX has a lower molecular mass than MY, thus 1.0 grams of MX generates a greater moles of solute than 1.0 grams of MY. Because the density of water decreases as the temperature of water increases, the mass of 10 mL water is greater at the lower temperature. This means that the largest molality is found with 10 mL water at 50 C, because the mass solvent is least.
as temperature increases density will decrease as the volume of the solution will increase...im all good here
Then a question in the same passage asks
Which solution has the HIGHEST boiling point? (side note molar mass of MX < MY)
A. 1.0 grams MX with 10 mL water at 25 C
B. 1.0 grams MY with 10 mL water at 25 C
C. 1.0 grams MX with 10 mL water at 50 C
D. 1.0 grams MX with 10 mL water at 50 C
Answer: C
"the solution with the highest boiling point is the solution with the highest molality of impurities. Molality is defined as moles solute per kg solvent. MX has a lower molecular mass than MY, thus 1.0 grams of MX generates a greater moles of solute than 1.0 grams of MY. Because the density of water decreases as the temperature of water increases, the mass of 10 mL water is greater at the lower temperature. This means that the largest molality is found with 10 mL water at 50 C, because the mass solvent is least.
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