Freya weighs an empty crucible and finds it to have a mass of 95.83 g (including the lid). After putting a spoonful of an unknown hydrate into the crucible, she finds that the mass has increased slightly to 99.87 g. She heats the crucible and its contents twice, and finds that the mass has dropped to 98.21 g. a.) What mass of hydrate did Freya start with? b.) How much water was driven off from the hydrate during the heating process? c.) How much anhydrous salt remained in the crucible?
Freya weighs an empty crucible and finds it to have a mass of 95.83 g (including the lid). After putting a spoonful of an unknown hydrate into the crucible, she finds that the mass has increased slightly to 99.87 g. She heats the crucible and its contents twice, and finds that the mass has dropped to 98.21 g. a.) What mass of hydrate did Freya start with? b.) How much water was driven off from the hydrate during the heating process? c.) How much anhydrous salt remained in the crucible?
Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter2: Atoms, Molecules, And Ions
Section: Chapter Questions
Problem 123CP: The early alchemists used to do an experiment in which water was boiled for several days in a sealed...
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Freya weighs an empty crucible and finds it to have a mass of 95.83 g (including the lid). After putting a spoonful of an unknown hydrate into the crucible, she finds that the mass has increased slightly to 99.87 g. She
heats the crucible and its contents twice, and finds that the mass has dropped to 98.21 g.
a.) What mass of hydrate did Freya start with?
b.) How much water was driven off from the hydrate during the heating process?
c.) How much anhydrous salt remained in the crucible?
d.) Based on Freya’s data, calculate the percentage of water in the sample of hydrate.
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