Question

$Cu_2Cl_2$ and $CuCl_2$ in aqueous medium

• A. $CuCl_2$ is more stable than $Cu_2Cl_2$
• B. Stability of $Cu_2Cl_2$ is equal to stability of $CuCl_2$
• C. Both are unstable
• D. $Cu_2Cl_2$ is more stable than $CuCl_2$

Answer 1

Answer: (A)

$CuCl_2$ is more stable than $Cu_2Cl_2$

Answer 2

$CuCl _{2}$ is more stable than $Cu _{2} Cl _{2}$. The size of $Cu ^{2+}$ is smaller than $Cu ^{+}$. The hydration enthalpy depends on the size of the cation. Smaller the size of the cation more will be the hydration enthalpy. Hence, more will be stability.