Sodium hexahydroxostannate (IV) is an inorganic compound, a salt of an alkali metal of sodium and hexahydroxobutyric acid with the formula Na 2 [Sn (OH) 6 ] (or Na 2 SnO 3 • 3H 2 O), colorless crystals, well soluble in water, solubility decreases with an increase in temperature.
| Hexahydroxostannate | |
|---|---|
 | |
| Are common | |
| Systematic name | Sodium hexahydroxostannate |
| Traditional names | Sodium hexahydroxosulfate; sodium stannate |
| Chem. formula | Na 2 [Sn (OH) 6 ] |
| Physical properties | |
| condition | colorless crystals |
| Molar mass | 266.73 g / mol |
| Density | 3.05 g / cm³ |
| Chemical properties | |
| Solubility in water | 61.3 15.5 ; 50 100 g / 100 ml |
| Classification | |
| Reg. CAS number | and |
| PubChem | |
| Reg. EINECS number | |
| Smiles | |
| Inchi | |
| ChemSpider | |
Getting
- Boiling in a concentrated solution of sodium hydroxide tin powder:
![{\displaystyle {\mathsf {Sn+2NaOH+4H_{2}O\ {\xrightarrow {100^{o}C}}\ Na_{2}[Sn(OH)_{6}]+2H_{2}}}}](https://wikimedia.org/api/rest_v1/media/math/render/svg/9ab2c7bf6830b0d943651ed54e65cdc0528e8ece)
- or tin oxide :
![{\mathsf {SnO_{2}+2NaOH+2H_{2}O\ {\xrightarrow {60-70^{o}C}}\ Na_{2}[Sn(OH)_{6}]}}](https://wikimedia.org/api/rest_v1/media/math/render/svg/dcd17e86bd3fc4f77b1405c03c89a51bbca6643b)
Physical Properties
Sodium hexahydroxostannate (IV) is isolated from the solution in the form of colorless crystals, rhombohedral system , space group R 3 , cell parameters a = 0.595 nm, c = 1.417 nm, Z = 3. Stable in air, soluble in water.
Chemical Properties
- When heated, decomposes:
![{\displaystyle {\mathsf {Na_{2}[Sn(OH)_{6}]\ {\xrightarrow {140^{o}C}}\ Na_{2}SnO_{3}+3H_{2}O}}}](https://wikimedia.org/api/rest_v1/media/math/render/svg/72e2d5d3c4e2fabff2eab02022da8629d943aca3)
![{\displaystyle {\mathsf {Na_{2}[Sn(OH)_{6}]\ {\xrightarrow {900^{o}C}}\ Na_{2}O+SnO_{2}+3H_{2}O}}}](https://wikimedia.org/api/rest_v1/media/math/render/svg/358ff3d7061707a4f54e743ce56b4986989d4ca8)
- Reacts with diluted acids:
![{\displaystyle {\mathsf {Na_{2}[Sn(OH)_{6}]+2HCl\ {\xrightarrow {}}\ SnO_{2}\downarrow +2NaCl+4H_{2}O}}}](https://wikimedia.org/api/rest_v1/media/math/render/svg/279205acc8a3e844d492a5f14c1355c57d85b206)
- Reacts with carbon dioxide :
![{\displaystyle {\mathsf {Na_{2}[Sn(OH)_{6}]+CO_{2}\ {\xrightarrow {}}\ SnO_{2}\downarrow +Na_{2}CO_{3}+3H_{2}O}}}](https://wikimedia.org/api/rest_v1/media/math/render/svg/2fa95223f79bdbee0f2b6302ca3de7c6258c4c2d)
- It enters into metabolic reactions:
Literature
- Lidin R.A. and other Chemical properties of inorganic substances: Textbook. manual for universities. - 3rd ed., Rev. - M .: Chemistry , 2000 .-- 480 p. - ISBN 5-7245-1163-0 .
- Ripan R., Chetyanu I. Inorganic chemistry. Chemistry of metals. - M .: Mir , 1971. - T. 1. - 561 p.
- Chemical Encyclopedia / Editorial Board: Knunyants I.L. et al. - M .: Soviet Encyclopedia , 1992. - T. 3. - 639 p. - ISBN 5-82270-039-8 .
- Chemistry Handbook / Editorial: Nikolsky B.P. et al. - 2nd ed., rev. - M.-L.: Chemistry, 1966. - T. 1. - 1072 p.
- Chemistry Handbook / Editorial: Nikolsky B.P. et al. - 3rd ed., rev. - L .: Chemistry, 1971. - T. 2. - 1168 p.
- CRC Handbook of Chemistry and Physics . - 89th Edition. - Taylor and Francis Group, LLC, 2008-2009.