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C-17
C.
Was CdCl2 crystalline in the open or in the closed bottle?
What happened to the water in the other bottle? Explain why, in terms of vapor pressure of water in
the atmosphere, and pressure of the water of hydration.
D.
Is CaCl
2(s)
efflorescent or deliquescent? Explain why, in terms of vapor pressure of water in the
atmosphere, and pressure of the water of hydration.
Of the hydrates used (CuSO
4
, CdCl2, CaCl2), which one(s) has(have) a pressure of the water of
hydration greater than the partial vapor pressure of water in the atmosphere at room temperature?
ASSESSMENT
Performance
(1.0 mark):
Identification of Ions
(2.0 marks):
Mass Percent of Water
(2.0 marks):
Laboratory Quiz
(5.0 marks):
Deductions
(if any):
TOTAL
(10.0 marks)
