A saturated solution of copper (II) sulfate was prepared by adding an excess of
small crystals to a flask of water. The flask which contained the saturated
solution and many small crystals of CuSO4 was sealed and placed in a cupboard
for several months. When it was removed, most of the small crystals were gone
and several large crystals had appeared. However, the concentration of CuSO4
in the solution was unchanged. Explain, describing the events that occur at the
molecular level, how it is possible for the crystals to change without a change in
the concentration of the solution.

Question

A saturated solution of copper (II) sulfate was prepared by adding an excess of
small crystals to a flask of water. The flask which contained the saturated
solution and many small crystals of CuSO4 was sealed and placed in a cupboard
for several months. When it was removed, most of the small crystals were gone
and several large crystals had appeared. However, the concentration of CuSO4
in the solution was unchanged. Explain, describing the events that occur at the
molecular level, how it is possible for the crystals to change without a change in
the concentration of the solution.

jfraser · Answer

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