Potassium hexahydroxoplatinate (IV) is an inorganic compound, a complex compound of platinum metal with the formula K 2 [Pt (OH) 6 ], yellow-green crystals, well soluble in water.
| Hexahydroxoplatinate | |
|---|---|
| Are common | |
| Systematic name | Potassium hexahydroxoplatinate (IV) |
| Traditional names | Potassium hexahydroxoplateate |
| Chem. formula | K 2 [Pt (OH) 6 ] |
| Physical properties | |
| condition | yellow green crystals |
| Molar mass | 375.32 g / mol |
| Density | 5.18 g / cm³ |
| Thermal properties | |
| T. melt. | different 160 ° C |
| Classification | |
| Reg. CAS number | |
| Reg. EINECS number | |
| Chemspider | |
Getting
- Reaction of potassium hexachloroplatinate (IV) with concentrated alkalis :
![{\mathsf {K_{2}[PtCl_{6}]+6KOH\ {\xrightarrow {100^{o}C}}\ K_{2}[Pt(OH)_{6}]\downarrow +6KCl}}](https://wikimedia.org/api/rest_v1/media/math/render/svg/2d679f768e32e3eff22d6d0510889c46bdfae7db)
Physical Properties
Potassium hexahydroxoplatinate (IV) forms yellow-green crystals of the trigonal syngony , space group R 3 , cell parameters a = 0.640 nm, c = 1.281 nm, Z = 3.
It is well dissolved in cold water.
Chemical Properties
- Decomposes when heated:
![{\mathsf {K_{2}[Pt(OH)_{6}]\ {\xrightarrow {250^{o}C}}\ Pt+2KOH+O_{2}+4H_{2}O}}](https://wikimedia.org/api/rest_v1/media/math/render/svg/0682d556aa9262f7636b72c4b0cd3099d84e6f49)
- Reacts with concentrated hot acids :
![{\mathsf {K_{2}[Pt(OH)_{6}]+6HCl\ {\xrightarrow {100^{o}C}}\ K_{2}[PtCl_{6}]\downarrow +6H_{2}O}}](https://wikimedia.org/api/rest_v1/media/math/render/svg/9901357801d6e0927f1a1dba062bd95201dd74c4)
- Decomposed by weak acids:
![{\mathsf {K_{2}[Pt(OH)_{6}]+2CH_{3}COOH+(n-4)H_{2}O\ {\xrightarrow {}}\ PtO_{2}\cdot nH_{2}O\downarrow +2CH_{3}COOK}}](https://wikimedia.org/api/rest_v1/media/math/render/svg/00e9407bb02e12cd37eae733162b41e0ba5a0e4a)
- Enters into exchange reactions:
![{\mathsf {K_{2}[Pt(OH)_{6}]+2AgNO_{3}\ {\xrightarrow {}}\ Ag_{2}[Pt(OH)_{6}]\downarrow +2KNO_{3}}}](https://wikimedia.org/api/rest_v1/media/math/render/svg/67247ba7dc4310ce6bf5c17a2924a738b36882f3)
Literature
- Chemist Handbook / Redkol .: Nikolsky B.P. et al. - 2nd ed., Rev. - M.-L.: Chemistry, 1966. - T. 1. - 1072 p.
- Chemist Handbook / Redkol .: Nikolsky B.P. et al. - 3rd ed., Rev. - L .: Chemistry, 1971. - T. 2. - 1168 p.
- Lidin R.A. and other Chemical properties of inorganic substances: Proc. manual for universities. - 3rd ed., Corr. - M .: Chemistry, 2000. - 480 p. - ISBN 5-7245-1163-0 .
- Ripan R., Chetyanu I. Inorganic chemistry. Metal Chemistry. - M .: Mir, 1972. - T. 2. - 871 p.