Семестр Nо 2 В -3 Flashcards

1
Q

FeCr2O4 -> K3[Fe(C2O4)3], KCr(SO4)2*12H2O

A

FeCr2O4 + H2SO4 (к) = Fe2(SO4)3 + Cr2(SO4)3 + SO2 + H2O

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2
Q

Разделение Cr2O3 и Fe2O3

A

Добавляем NaOH и получаем гидроксиды. Гидроксиды нагреваем до оксидов. А оксиды + H2SO4 = Fe2(SO4)3 + H2O

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3
Q

Cr2O3 -> KCr(SO4)2*12H2O

A

Cr2O3 + KNO3 + K2CO3 = K2CrO4 + KNO2 + CO2

K2CrO4 + H2SO4 = K2Cr2O7 + K2SO4 + H2O

K2Cr2O7 + EtOH + H2SO4 + H2O = KCr(SO4)2*12H2O + CH3COH

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4
Q
A
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