Scandium(III) hydroxide

Scandium hydroxide
Names
	IUPAC name Scandium(III) hydroxide
Identifiers
CAS Number	17674-34-9 ;
3D model (JSmol)	Interactive image;
ChemSpider	78687;
ECHA InfoCard	100.037.855
EC Number	241-658-0;
PubChem CID	87230;
CompTox Dashboard (EPA)	DTXSID90938848 ;
	InChI InChI=1S/3H2O.Sc/h3*1H2;/q;;;+3/p-3 Key: LQPWUWOODZHKKW-UHFFFAOYSA-K;
	SMILES [Sc+3].[OH-].[OH-].[OH-];
Properties
Chemical formula	Sc(OH)3
Molar mass	95.977 g·mol−1
Density	2.65 g·cm−3
Solubility in water	0.268 g/(100 mL)
Solubility product (Ksp)	2.22×10−31
Related compounds
Other anions	Scandium chloride; Scandium fluoride; Scandium nitrate
Other cations	Yttrium(III) hydroxide; Lutetium(III) hydroxide
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

Scandium(III) hydroxide is an inorganic compound with the chemical formula Sc(OH)₃, the trivalent hydroxide of scandium. It is an amphoteric compound.^[2] It is slightly soluble in water, and its saturated solution (pH = 7.85) contains Sc(OH)₃ and a small amount of Sc(OH)+2. The solubility of scandium(III) hydroxide in water is 0.0279 mol/L. It will convert to ScO(OH) after aging, greatly reducing the solubility (0.0008 mol/L).^[3] Scandium(III) hydroxide can be produced by reacting scandium salts and alkali hydroxides.^[4] In the reaction, different starting ingredients can generate different intermediates such as Sc(OH)_1.75Cl_1.25, Sc(OH)₂NO₃ and Sc(OH)_2.32(SO₄)_0.34.^[5]

References

^ John Rumble (June 18, 2018). CRC Handbook of Chemistry and Physics (99 ed.). CRC Press. pp. 5–189. ISBN 978-1138561632.
^ Moeller, Therald.; Kremers, Howard E. (1945). "The Basicity Characteristics of Scandium, Yttrium, and the Rare Earth Elements". Chemical Reviews. 37 (1): 97–159. doi:10.1021/cr60116a003. ISSN 0009-2665.
^ Orlov, Yu. F.; Maslov, E. I.; Belkina, E. I. (2013). "Solubilities of metal hydroxides". Russian Journal of Inorganic Chemistry. 58 (11): 1306–1314. doi:10.1134/S0036023613110168. ISSN 0036-0236. S2CID 96558802.
^ Vickery, R. C. (1955). "Scandium hydroxide and scandate ions". Journal of the Chemical Society (Resumed): 251. doi:10.1039/jr9550000251. ISSN 0368-1769.
^ Mironov, N. N.; Mal'kevich, N. V. Scandium hydroxide formation reaction. Zhurnal Neorganicheskoi Khimii, 1970. 15 (3): 599-601.

[crc-1] John Rumble (June 18, 2018). CRC Handbook of Chemistry and Physics (99 ed.). CRC Press. pp. 5–189. ISBN 978-1138561632.

[2] Moeller, Therald.; Kremers, Howard E. (1945). "The Basicity Characteristics of Scandium, Yttrium, and the Rare Earth Elements". Chemical Reviews. 37 (1): 97–159. doi:10.1021/cr60116a003. ISSN 0009-2665.

[3] Orlov, Yu. F.; Maslov, E. I.; Belkina, E. I. (2013). "Solubilities of metal hydroxides". Russian Journal of Inorganic Chemistry. 58 (11): 1306–1314. doi:10.1134/S0036023613110168. ISSN 0036-0236. S2CID 96558802.

[4] Vickery, R. C. (1955). "Scandium hydroxide and scandate ions". Journal of the Chemical Society (Resumed): 251. doi:10.1039/jr9550000251. ISSN 0368-1769.

[5] Mironov, N. N.; Mal'kevich, N. V. Scandium hydroxide formation reaction. Zhurnal Neorganicheskoi Khimii, 1970. 15 (3): 599-601.

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Scandium(III) hydroxide

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