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Drakon01
@Drakon01
July 2022
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20 баллов!!! Помогите написать ионное уравнение:
K2Cr2O7+H2O+H2SO4---->
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dec77cat
K₂Cr₂O₇ + 6FeO + 13H₂SO₄(конц.) = K₂SO₄ + 3Fe₂(SO₄)₃ + Cr₂(SO₄)₃ + 13H₂O
Cr₂O₇²⁻ + 14H⁺ + 6e = 2Cr³⁺ + 7H₂O 1
FeO + 2H⁺ - e = Fe³⁺ + H₂O 6
Cr₂O₇²⁻ + 14H⁺ + 6FeO + 12H⁺ = 2Cr³⁺ + 7H₂O + 6Fe³⁺ + 6H₂O
Cr₂O₇²⁻ + 26H⁺ + 6FeO = 2Cr³⁺ + 13H₂O + 6Fe³⁺
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Drakon01
Что восстановитель и окислитель?
dec77cat
Хром (+6) окислитель, железо (+2) восстановитель.
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Answers & Comments
Cr₂O₇²⁻ + 14H⁺ + 6e = 2Cr³⁺ + 7H₂O 1
FeO + 2H⁺ - e = Fe³⁺ + H₂O 6
Cr₂O₇²⁻ + 14H⁺ + 6FeO + 12H⁺ = 2Cr³⁺ + 7H₂O + 6Fe³⁺ + 6H₂O
Cr₂O₇²⁻ + 26H⁺ + 6FeO = 2Cr³⁺ + 13H₂O + 6Fe³⁺