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O ácido sulfúrico ou ácido sulfúrico, conhecido na antiguidade como óleo de vitríolo, é um ácido mineral composto pelos elementos enxofre, oxigênio e hidrogênio, com fórmula molecular H₂SO₄. É um líquido incolor, inodoro e viscoso, miscível com água.
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O que o ácido clorídrico faz com um parafuso enferrujado? Neste experimento, um parafuso coberto por ferrugem é imerso em ácido clorídrico . A reação é imediata: o HCl reage com a ferrugem, dissolvendo-a e liberando gás hidrogênio — que aparece em forma de bolhas na superfície. A equação simplificada da reação é: Fe₂O₃ + 6HCl → 2FeCl₃ + 3H₂O Ou seja, o óxido de ferro se transforma em cloreto de ferro , que é solúvel em água, limpando visualmente o parafus
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