Mute
Com.Ciência.Gaia
O que fez essa solução transparente ficar vermelha tão rápido? O efeito visual impressionante ocorre por uma sequência de reações químicas bem conhecidas. A solução contém tiocianato de potássio (KSCN), que fornece íons tiocianato (SCN⁻), inicialmente incolores. Quando o fio de ferro metálico entra na solução contendo ácido clorídrico (HCl) e peróxido de hidrogênio (H₂O₂), o ferro sofre oxidação. O peróxido de hidrogênio atua como agente oxidante, acelerando a transformação do ferro metálico (
Follow
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