Laborator._praktikum_po_obschej_himii
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76
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: Na2S2O3 (1 ), H2SO4 (2 ), FeCl3 ( .), FeCl3 ( .), KCNS ( .), KCNS ( .), H2O2 (3%); KCl ( .). MnO2 ( .).
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Na2S2O3 + H2SO4 Na2SO4 + H2S2O3 |
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6.1.
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( . 6.1).
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. 6.1.
2. -
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(III) : FeCl3 + 3KCNS Fe(CNS)3 + 3KCl.
Fe(CNS)3 . -
Fe(CNS)3, . .
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2 (III) FeCl3, -
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2 KCNS,
KCl.
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6.2
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