Question
hich of the following statement is not correct?
✓
Answer
$\ce{La(OH)_3}$ is less basic than $\ce{Lu(OH)_3}$ is an incorrect statement.
Basic strength $\ce{La(OH)_3 > Lu(OH)_{3}}$
Due to Lanthanide contraction as the size of the lanthanide ions decreases from $\ce{La^{+3}}$ to $\ce{Lu^{+3}},$ the covalent character of hydroxides increases and hence basic strength decreases.
Basic strength $\ce{La(OH)_3 > Lu(OH)_{3}}$
Due to Lanthanide contraction as the size of the lanthanide ions decreases from $\ce{La^{+3}}$ to $\ce{Lu^{+3}},$ the covalent character of hydroxides increases and hence basic strength decreases.
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