Praseodymium(III) hydroxide

Praseodymium(III) hydroxide
Identifiers

CAS Number	16469-16-2^Y
3D model (JSmol)	Interactive image
ChemSpider	77046^Y
ECHA InfoCard	100.036.815
EC Number	240-513-9
PubChem CID	85432
CompTox Dashboard (EPA)	DTXSID20936978
InChI InChI=1S/3H2O.Pr/h3*1H2;/q;;;+3/p-3 Key: ZLGIGTLMMBTXIY-UHFFFAOYSA-K
SMILES [Pr+3].[OH-].[OH-].[OH-]
Properties
Chemical formula	Pr(OH)₃
Molar mass	191.932
Appearance	green solid^[1]
Melting point	220 °C (493 K)（dissolves）^[2]
Solubility in water	Virtually insoluble in water
Solubility product (K_sp)	3.39×10⁻²⁴^[3]
Related compounds
Other anions	Praseodymium(III) oxide
Other cations	Cerium(III) hydroxide Neodymium(III) hydroxide
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

Praseodymium(III) hydroxide is an inorganic compound with a chemical formula Pr(OH)₃.

Production

The reaction between ammonia water and praseodymium(III) nitrate produces praseodymium(III) hydroxide:^[2]

Pr(NO₃)₃ + 3 NH₃·H₂O → Pr(OH)₃↓ + 3 NH₄NO₃

Praseodymium(III) hydroxide can react with acid and produce praseodymium salts:

Pr(OH)₃ + 3 H⁺ → Pr³⁺ + 3 H₂O, for example;

Pr(OH)₃ + 3CH₃COOH forms Pr(CH₃CO₂)₃ + 3H₂O;

Praseodymium(III) hydroxide + Acetic acid forms praseodymium(III) acetate and water.

^ Yi, Xianwu. Series of Inorganic Chemistry - Vol 7 (in Chinese). Science Press. pp. 168-171. (2) Hydroxides
^ ^a ^b 《无机化合物制备手册》. 朱文祥主编. 化学工业出版社. P_98~99. 【III-103】氢氧化镨（praseodymium hydroxide）
^ John Rumble (June 18, 2018). CRC Handbook of Chemistry and Physics (99 ed.). CRC Press. pp. 5–189. ISBN 978-1138561632.