d and f Block ElementshardNUMERICAL

The Wacker process is a highly vital industrial catalytic pathway used globally to oxidize ethene ()d and f Block Elements Chemistry Question

Question

The Wacker process is a highly vital industrial catalytic pathway used globally to oxidize ethene ($C_2H_4$) directly into ethanal ($CH_3CHO$) in the presence of water and air. This process fundamentally relies on a specific transition metal chloride catalyst. What is the precise integer oxidation state of the central Palladium ($Pd$) atom in the active starting catalyst ($PdCl_2$) employed in this process?

Answer: 2

💡 Solution & Explanation

The Wacker process explicitly utilizes Palladium(II) chloride ($PdCl_2$) as the primary homogenous catalyst, often coupled with $CuCl_2$ as a co-catalyst to re-oxidize the Palladium. In the starting catalyst compound $PdCl_2$, the two chloride ligands each carry a formal $-1$ charge. To maintain electrical neutrality, the central Palladium atom must possess a formal oxidation state of exactly $+2$.

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