Mute
Com.Ciência.Gaia
O que o sangue e esse pó amarelo têm em comum para fazer o luminol acender no escuro? A resposta envolve ferro. Mas não é simplesmente porque “os dois têm ferro”. Primeiro, o luminol é colocado em meio básico com hidróxido de sódio (NaOH). Depois entra o peróxido de hidrogênio (H₂O₂), que atua como agente oxidante. Sem algo que favoreça o processo, porém, a emissão pode ser muito menos intensa. É aí que entra o ferricianeto de potássio, K₃[Fe(CN)₆]. Nesse complexo, o ferro está fortemente coo
Follow
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