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ID number:314294
 
Evaluation:
Published: 16.12.2004.
Language: Latvian
Level: Secondary school
Literature: n/a
References: Not used
Extract

Dzelzij ir raksturīgi dzelzs( /// )un dzelzs (// ).Dzelzs veido trīs oksīdus.
Dzelzs ( // )oksīds FeO ir melna , kristāliska viela.To iegūst, reducējot dzelzs (/// oksīdu 500 grādu temperatūrā.)ar oglekļa (//):
Fe2 O3 + CO—2FeO + CO2
Tas ir bāzisks oksīds.
Dzelzs (///,//) oksīds Fe3 O4 ir melna, ļoti stabila kristāliska viela ar feromagnētiskām īpašībām. .Tāpēc šo oksīdu sauc par magnetītu. Tas veidojas ar dzelzs reakcijā ar skābekli. Tas reaģē ar skābēm, veidojot sāļus: Fe3 O + 4 H2 SO4 —FeSO4 + Fe2 (SO4 )3 + 4H2 O…

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