Imagine that two 1-L beakers, A and B, each containingan aqueous solution of fructose (a nonvolatile sugar withmolecular weight= 180) are placed together in a box,which is then sealed. (The concentrations of the solutionsare not necessarily the same.) The temperature remainsconstant at 26°C. Initially, there is 600 mL of solution inA and 100 mL of solution in B. As the solutions stand inthe sealed box, their volumes change slowly for a while.When they stop changing, beaker A contains 400 mL andbeaker B contains 300 mL. It is then determined that thesolution in A is 1.5 M in fructose and has a density of1.10 g mL-1 .(a) What is the molar concentration of fructose in the solution in beaker B at the end? Explain.(b) Calculate the concentration of fructose in the solution in A at the start.(c) Calculate the concentration of the fructose in the solution in B at the start.(d) The vapor pressure of pure water at 26°C is 25.2 torr. What is the pressure of water vapor in the box at the end, after the volumes have stopped changing?
Imagine that two 1-L beakers, A and B, each containing
an aqueous solution of fructose (a nonvolatile sugar with
molecular weight= 180) are placed together in a box,
which is then sealed. (The concentrations of the solutions
are not necessarily the same.) The temperature remains
constant at 26°C. Initially, there is 600 mL of solution in
A and 100 mL of solution in B. As the solutions stand in
the sealed box, their volumes change slowly for a while.
When they stop changing, beaker A contains 400 mL and
beaker B contains 300 mL. It is then determined that the
solution in A is 1.5 M in fructose and has a density of
1.10 g mL-1 .
(a) What is the molar concentration of fructose in the
solution in beaker B at the end? Explain.
(b) Calculate the concentration of fructose in the solution
in A at the start.
(c) Calculate the concentration of the fructose in the solution in B at the start.
(d) The vapor pressure of pure water at 26°C is 25.2 torr.
What is the pressure of water vapor in the box at the
end, after the volumes have stopped changing?
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