Question

$[CuC{l}_4{]}^{2-}$ exists while $[Cu{I}_4{]}^{2-}$ does not exist, because:

• A. $I^{-}$ is stronger reductant than $C{l}^{-}$
• B. $I^{-}$ is weaker reductant than $C{l}^{-}$
• C. $I^{-}$ is stronger oxidant than $C{l}^{-}$
• D. none of the above

Answer 1

Answer: (A)

$I^{-}$ is stronger reductant than $C{l}^{-}$

As $I^{-}$ is stronger reducing agent, i.e. reductant than $C{l}^{-}$ and reduces $C{u}^{2+}$ into Cul and Itself is oxidised into $I_2$. $C{l}^{-}$ is not that much strong reducing agent and does not reduce $C{u}^{2+}$. Therefore, $[CuC{l}_4{]}^{2-}$ exists but $[Cu{I}_4{]}^{2-}$ does not.