Faraday Paradox (Electrochemistry)

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Michael Faraday mengamati bahwa besi yang dicelupkan ke asam nitrat pekat menjadi pasif — tidak bereaksi, meski secara kimia besi seharusnya larut. Bahkan setelah dikeluarkan dari asam nitrat, besi tetap pasif dalam asam encer yang biasanya melarutkannya.

Mekanisme: asam nitrat pekat mengoksidasi permukaan besi membentuk lapisan oksida besi (Fe₂O₃/Fe₃O₄) yang sangat tipis dan rapat, menutup permukaan logam dari reaksi lebih lanjut. Prinsip pasivasi ini menjadi dasar teknologi perlindungan korosi modern: stainless steel, anodisasi aluminium, dan coating oksida untuk ketahanan kimia. Sangat relevan dalam industri kimia dan konstruksi.

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Kumpulan Paradoks — Index Barbershop Paradox What the Tortoise Said to Achilles Catch-22 Drinker Paradox Paradox of Free Choice Paradox of Entailment Lottery Paradox Raven Paradox Ross' Paradox Temperature Paradox Unexpected Hanging Paradox Barber Paradox Bhartrhari's Paradox Berry Paradox Crocodile Dilemma Paradox of the Court Curry's Paradox Epimenides Paradox Grelling–Nelson Paradox Hilbert–Bernays Paradox I Know That I Know Nothing Kleene–Rosser Paradox Knower Paradox Liar Paradox Card Paradox No-no Paradox Pinocchio Paradox Quine's Paradox Yablo's Paradox Opposite Day Richard's Paradox Russell's Paradox Ship of Theseus Sorites Paradox All Horses Are the Same Color Ant on a Rubber Rope Cramer's Paradox Elevator Paradox Interesting Number Paradox Potato Paradox Burali-Forti Paradox Cantor's Paradox Abelson's Paradox Accuracy Paradox Berkson's Paradox Freedman's Paradox Friendship Paradox Inspection Paradox Lindley's Paradox Low Birth Weight Paradox Simpson's Paradox Will Rogers 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