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

The Correct Option is A

In aqueous solutions, copper(I) chloride (Cu\(_2\)Cl\(_2\)) is more stable than copper(II) chloride (CuCl\(_2\)) due to the nature of copper ions and their oxidation states. Copper(I) chloride, in the form of Cu\(_2\)Cl\(_2\), is relatively stable because it tends to remain in the +1 oxidation state, whereas CuCl\(_2\), which contains copper in the +2 oxidation state, is less stable in aqueous medium due to the instability of copper(II) ions in water.

Thus, Cu\(_2\)Cl\(_2\) is more stable than CuCl\(_2\) in aqueous medium.

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.