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Which outcome is caused by increased ion concentration during electrodeposition?

A)Enhanced electromigration hinders layer formation
B)Increased polarization exacerbates surface roughness
C)Accelerated surface diffusion diminishes grain size
D)Reduced overpotential facilitates uniform deposition

💡 Explanation

Increased concentration leads to concentration polarization, therefore increasing the electrode potential necessary to drive deposition. Surface roughness increases, rather than uniform deposition, because concentration gradients become diffusion-limited, unevenly distributing metal deposition due to electrical migration.

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