Cobalt(II) chloride is commonly obtained from chemical supply houses as a hydrate with the...
Question:
Cobalt(II) chloride is commonly obtained from chemical supply houses as a hydrate with the formula {eq}CoCl_2 \cdot 6H_2O {/eq}. An analysis showed that 25.0 g of this hydrate contains 11.3 g of water. What is the percent water by weight in this hydrate?
Calculation of % water in the hydrated sample
Cobalt chloride hexahydrate is pink in color and dihydrate is purple in color. Because it changes color, it is used as an indicator for water in desiccants.
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{eq}CoCl_2\cdot 6H_2O \rightarrow CoCl_2 + 6H_2O {/eq}
in the above formula, 25 g of {eq}CoCl_2\cdot 6H_2O {/eq} gives 11.3 g of water
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Dehydration Reaction: Definition & Examples
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Chapter 4 / Lesson 12
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Learn about dehydration. Understand what a dehydration reaction is, see a comparison between hydrolysis vs. dehydration, and see examples of a dehydration reaction.
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