Solution 1 Mass of KNO3 9.982 g Volume of Solution 12.5 mL Crystallization temperature 64.1 C Calculate the Ksp value for KNO3 at the crystallization temperature.

Chemistry: The Molecular Science
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Author:John W. Moore, Conrad L. Stanitski
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Chapter4: Energy And Chemical Reactions
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  1. A hot water bath was made by adding about 250-mL of distilled water to a 400-mL beaker. The beaker was placed on a hot plate and heated until the water was about 70oC.
  2. 9.982 g KNO3 was added to a 25-mL graduated cylinder.
  3. About 8 mL of distilled water was added to the graduated cylinder and it was placed in the hot water bath. The mixture was stirred continuously with a temperature probe and heated until all the KNO3 dissolved. The solution was clear and colorless and the volume of this solution was 12.5 mL. (This initial solution is called Solution 1.)
  4. The graduated cylinder was removed from the hot water bath and, while continuing to stir, Solution 1 was allowed to cool. White crystals of KNO3 were first observed at 64.1oC.
  Solution 1
Mass of KNO3 9.982 g
Volume of Solution 12.5 mL
Crystallization temperature 64.1 C

Calculate the Ksp value for KNO3 at the crystallization temperature.

 

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