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锰酸盐

锰酸盐
识别
CAS号 14333-14-3  checkY
性质
化学式 MnO2−
4
摩尔质量 118.94 g·mol⁻¹
若非注明,所有数据均出自标准状态(25 ℃,100 kPa)下。

锰酸盐广义上是指锰的含氧酸盐。[1]但通常所说的锰酸盐特指MnO2−
4
离子所对应的+6价的锰酸盐。[1]锰(VI)酸盐是唯一已知的含Mn(VI)的物种。[2]

锰酸盐的制备

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锰酸盐溶液

锰酸钠锰酸钾可以通过对应的高锰酸盐和其氢氧化物浓溶液(5–10 M)反应24 h或加热得到。[3]

4 MnO
4
+ 4 OH4 MnO2−
4
+ 2 H2O + O2

工业上,锰酸钾通过二氧化锰和熔融的氢氧化钾硝酸钾(或空气作为氧化剂)反应得到:[2]

2 MnO2 + 4 OH + O22 MnO2−
4
+ 2 H2O

其它价态的锰酸盐

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锰酸盐还存在+3、+4和+5相对低价的锰酸盐以及+7价的高锰酸盐

参考文献

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  1. ^ 1.0 1.1 国际纯粹与应用化学联合会 (2005). 无机化学命名法 (IUPAC 2005年推荐). Cambridge (UK): RSC英语RSCIUPAC. ISBN 0-85404-438-8. pp. 74–75, 77–78, 313, 338. 电子版。.
  2. ^ 2.0 2.1 Cotton, F. Albert; Wilkinson, Geoffrey, Advanced Inorganic Chemistry 4th, New York: Wiley: 746, 1980, ISBN 0-471-02775-8 .
  3. ^ Nyholm, R. S.; Woolliams, P. R., Manganates(VI), Inorg. Synth., 1986, 11: 56–61 .
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锰酸盐
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