A 81.5 g sample of calcium chloride is dissolved in 102 g of water at 45 degrees Celsius. The solution is cooled to 20.0 degrees Celsius and no precipitate is observed. The solution is ___________.
A. Hydrated
B. Placated
C. unsaturated
D. Saturated
E. supersaturated
Chemistry question!?
2017-10-04 11:57 pm
回答 (2)
2017-10-05 1:06 am
✔ 最佳答案
E. supersaturatedalthough I don't see how you can know that without looking up the solubility of CaCl2 at 20°C and determining that only
(74.5 g) / (100 g) x (102 g) = 76.0 g of CaCl2 will dissolve in 102 g of water at that temperature.
2017-10-05 1:04 am
A 81.5 g sample of calcium chloride is dissolved in 102 g of water at 45 degrees Celsius. The solution is cooled to 20.0 degrees Celsius and no precipitate is observed. The solution is __C. unsaturated__.
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