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← ScienceWhich 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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