Which of the following would have the lowest vapor pressure?
A. 0.8 m C6H12O6
B. 0.10 m C6H12O6
C. 0.05 m C6H12O6
D. 0.15 m C6H12O6
I think it is D... is that correct?
Which of the following would have the lowest boiling point?
A. 0.8 m C6H12O6
B. 0.10 m C6H12O6
C. 0.05 m C6H12O6
D. 0.5 m C6H12O6
I think it is C... is that correct?
right on both.
Vapor pressure depression with a nonvolitle solute depends on concentration, as does boiling point elevation.
To determine the lowest vapor pressure and boiling point, we need to understand the concept of colligative properties, specifically vapor pressure and boiling point elevation.
Vapor pressure refers to the pressure exerted by a vapor when it is in equilibrium with its liquid phase at a given temperature. Vapor pressure depends on the concentration of solute particles in the solution. According to Raoult's Law, the vapor pressure of a solution is directly proportional to the mole fraction of the solute.
Boiling point elevation refers to the increase in the boiling point of a solvent caused by the addition of a non-volatile solute. The boiling point elevation depends on the concentration of the solute particles in the solution. The greater the concentration, the greater the boiling point elevation.
Now, let's apply this knowledge to answer the questions:
For the first question, we are comparing the different concentrations of the same solute C6H12O6. Lower vapor pressure is associated with a higher concentration of solute particles in the solution. Therefore, the solution with the lowest vapor pressure will have the highest concentration. In this case, option D with a concentration of 0.15 m C6H12O6 has the highest concentration and, therefore, the lowest vapor pressure.
For the second question, we want to determine the solution with the lowest boiling point. According to the boiling point elevation, a higher concentration of solute particles leads to a greater increase in boiling point. Therefore, the solution with the lowest boiling point will have the lowest concentration. In this case, option C with a concentration of 0.05 m C6H12O6 has the lowest concentration and, therefore, the lowest boiling point.
So, your answers are correct. Option D has the lowest vapor pressure, and option C has the lowest boiling point.