The addition of any solute to a solvent will...?
(B) lower the vapor pressure and increase the osmotic pressure.
(C) raise the vapor prssure and increase the osmotic pressure.
(D) Raise the vapor pressure and decrease the osmotic pressure.
Answer:
generally, lower the vapor pressure and decrease the osmotic pressure.
The lower vapor pressure will be manifested in an increased boiling point. Example, cooks will add salt to water to raise the temperature. The temperature will increase because the vapor pressure is lowered by the salt addition and, thus, will take more energy to reach atmospheric pressure and boiling occurs when the vapor pressure of a liquid equals or exceeds atmospheric pressure.
The decreased osmotic pressure will be manifested in the increased movement of solvent TOWARD the higher concentration of solute. If you consider that fluids move in the direction away from higher pressure toward lower pressure.
I would say B. Lower the vapor pressure and increase the osmotic pressure.
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