Is lanthanum hydroxide soluble in water?
Lanthanum hydroxide
| Names | |
|---|---|
| Chemical formula | La(OH)3 |
| Molar mass | 189.93 g/mol |
| Solubility in water | Ksp= 2.00·10−21 |
| Structure |
Is LA OH 3 or Lu OH 3 more basic?
La(OH)3 is more basic than Lu(OH)3 , As the size of the lanthanoid ion decrease from La3+→Lu3+ the ionization energy increases and therefore metallic character decrease. Hence , the basic strength decreases from La(OH)3 to Lu(OH)3.
Why is lanthanum hydroxide more basic?
Due to lanthanide contraction, the size of Lu3+ is decreased and therefore Lu(OH)3 shows more covalent character (Small cation, more is covalent character – Fajan’s rule). Thus La(OH)3 is more ionic and thus more basic.
Is lanthanum oxide soluble in water?
Lanthanum oxide is an odorless, white solid. It is insoluble in water, and soluble in dilute acid. Lanthanum oxide nanoparticles have high photoelectric conversion efficiency.
What is lanthanum hydride?
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references. Lanthanum decahydride is a polyhydride or superhydride compound of lanthanum and hydrogen (LaH10) that shows promise of being a high-temperature superconductor.
What is the solubility product expression for La OH 3?
The solubility product for the reaction La ( OH ) 3 ( s ) ⇄ La 3 + + 3 OH − is K s 0 ≈ 10 − 19 ; in 1 mM NaOH the concentration of La3+ in the solution is only 10−10 M in equilibrium with the La(OH)3 precipitate.
Why La3 is the strongest base?
(a) Due to lanthanoid contraction, the size of Lu3+ is smaller than that of La3+ ion. Thus, Lu-OH bond is stronger than La-OH bond. Hence, La(OH)3 is stronger base than Lu(OH)3.
Which is the strongest base among the following La OH 3?
Therefore, the basic strength of the corresponding hydroxides decreases from La(OH)3 to Lu(OH)3. Therefore, La(OH)3 is the strongest base.
Which is more basic lanthanum or lutetium?
Basicity depends on size of the cation. The larger the cation, the greater is the basicity. La 3+ in La(OH)3 is larger than Lu 3+ in Lu(OH)3 due to lanthanoid contraction. So La(OH)3 is more basic.
Why La3 is the strongest base while Lu3 is the weakest base?
What is lanthanum fluoride used for?
Lanthanum fluoride (LaF3) finds uses in fibre optics, electrodes, fluorescent lamps and radiation applications. It is also used as an ion-specific fluoride detecting electrode in solutions.