Across the lanthanide series, the basicity of the lanthanide hydroxides

Question

Across the lanthanide series, the basicity of the lanthanide hydroxides (A) increases (B) decreases (C) first increases and then decreases (D) first decreases and then increases

Tardigrade Admin · Accepted Answer

As the ionic size of lanthanide decreases, the covalent character of their hydroxide increases. Due to which, their basicity decreases.

Q. Across the lanthanide series, the basicity of the lanthanide hydroxides

increases

decreases

first increases and then decreases

first decreases and then increases

As the ionic size of lanthanide decreases, the covalent character of their hydroxide increases. Due to which, their basicity decreases.