9-Fe,Ru,Os (VIII skupina) Flashcards

1
Q

pridobivanje Fe iz kromita FeCr2O4

A

FeCr2O4 + 4 C → Fe + 2 Cr + 4 CO

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2
Q

reakcije v plavžu

A

500°C

850→1000°C
3 Fe2O3 + CO → 2 Fe2O4 + CO2
Fe3O4 + CO → 3 FeO + CO2
FeO + CO → Fe + CO2

2CO ↔ C + CO2
CaCO3 → CaO + CO2
CaO + SiO2 → CaSiO3

1300→1700°C
2 C + O2 → 2 CO

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3
Q

Fe + kisline → se eraztaplja

A

Fe + H2SO4(razr) → FeSO4 + H2 (25°C)

Fe + 4 HNO3 → Fe(NO3)3 + NO + 2 H2O (80°C)

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4
Q

protoliza Fe(H2O)6

A

Fe(H2O)6 + H2O ↔ Fe(H2O)5(OH) + H3O(+)

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