Question

Out of LU(OH)₃ and La(OH)₃ which is more basic and why?

Answer 1

1. As we move from Ce³⁺ to Lu³⁺ , the basic character of Lu³⁺ ions decreases. 

2. Due to the decrease in the size of Lu³⁺ ions, the ionic character of Lu – OH bond decreases, covalent character increases which results in the decrease in the basicity. 

3. Hence, La(OH)₃ is more basic than Lu(OH)₃.