It is often possible to change a hydrate into an anhydrous compound by heating it to drive off the water (dehydration). A 30.45 gram sample of a hydrate of CoCl₂ was heated thoroughly in a porcelain crucible, until its weight remained constant. After heating, 16.62 grams of the anhydrous compound remained. What is the formula of the hydrate?

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It is often possible to change a
hydrate into an anhydrous
compound by heating it to drive
off the water (dehydration).
A 30.45 gram sample of a
hydrate of CoCl₂ was heated
thoroughly in a porcelain
crucible, until its weight
remained constant. After
heating, 16.62 grams of the
anhydrous compound remained.
What is the formula of the
hydrate?
Use a period instead of a dot in the
formula of the hydrate.
anhydrous salt
-hydrated salt
Transcribed Image Text:It is often possible to change a hydrate into an anhydrous compound by heating it to drive off the water (dehydration). A 30.45 gram sample of a hydrate of CoCl₂ was heated thoroughly in a porcelain crucible, until its weight remained constant. After heating, 16.62 grams of the anhydrous compound remained. What is the formula of the hydrate? Use a period instead of a dot in the formula of the hydrate. anhydrous salt -hydrated salt
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