Ethanol cannot be dried by anhydrous CaCl_2 d | vedclass

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Question

(A) Anhydrous $CaCl_2$ is a common drying agent for many organic solvents. However,it cannot be used to dry ethanol because it reacts with ethanol to

Vedclass · Accepted Answer

$CaCl_2 \cdot 2C_2H_5OH$

Vedclass · Answer

(A) Anhydrous $CaCl_2$ is a common drying agent for many organic solvents. However,it cannot be used to dry ethanol because it reacts with ethanol to form a stable solvated complex. The reaction is: $CaCl_2 + 4C_2H_5OH \rightarrow CaCl_2 \cdot 4C_2H_5OH$. Among the given options,the complex $CaCl_2 \cdot 4C_2H_5OH$ is the standard solvated product,but since the question asks for the specific solvated product formed in this context,and based on standard chemical literature,the correct adduct is $CaCl_2 \cdot 4C_2H_5OH$. Given the options provided,there is a discrepancy in the stoichiometry. However,$CaCl_2$ forms adducts with alcohols similar to how it forms hydrates. Assuming the question implies the formation of a stable adduct,the correct answer is $CaCl_2 \cdot 4C_2H_5OH$,but since it is not listed,we identify that $CaCl_2$ forms adducts with ethanol.

Ethanol cannot be dried by anhydrous $CaCl_2$ due to the formation of the following solvated product:

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