“tin(II) chloride”的概念、定义、翻译、参考文献-科学参考

tin(II) chloride

Chemistry

A white solid, SnCl₂, soluble in water and ethanol. It exists in the anhydrous form (rhombic; r.d. 3.95; m.p. 246°C; b.p. 652°C) and as a dihydrate, SnCl₂.2H₂O (monoclinic; r.d. 2.71; m.p. 37.7°C). The compound is made by dissolving metallic tin in hydrochloric acid and is partially hydrolysed in solution.
${Sn}^{2 +} {+ H}_{2} O ⇌ {SnOH}^{+} {+ H}^{+}$
Excess acid must be present to prevent the precipitation of basic salts. In the presence of additional chloride ions the pyramidal ion [SnCl₃]⁻ is formed; in the gas phase the SnCl₂ molecule is bent. It is a reducing agent in acid solutions and oxidizes slowly in air:
${Sn}^{2 +} \to {Sn}^{4 +} + 2 e$

单词	tin(II) chloride
释义	tin(II) chloride Chemistry A white solid, SnCl₂, soluble in water and ethanol. It exists in the anhydrous form (rhombic; r.d. 3.95; m.p. 246°C; b.p. 652°C) and as a dihydrate, SnCl₂.2H₂O (monoclinic; r.d. 2.71; m.p. 37.7°C). The compound is made by dissolving metallic tin in hydrochloric acid and is partially hydrolysed in solution. ${Sn}^{2 +} {+ H}_{2} O ⇌ {SnOH}^{+} {+ H}^{+}$ Excess acid must be present to prevent the precipitation of basic salts. In the presence of additional chloride ions the pyramidal ion [SnCl₃]⁻ is formed; in the gas phase the SnCl₂ molecule is bent. It is a reducing agent in acid solutions and oxidizes slowly in air: ${Sn}^{2 +} \to {Sn}^{4 +} + 2 e$
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