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Redox Reactions in Everyday Life: From Corrosion to Metal Extraction

This guide explores common redox reactions occurring in our environment, focusing on the rusting of iron, the bleaching process with sodium hypochlorite, and electrochemical reactions in batteries. The rusting of iron is represented by the equation 4Fe(s) + O2(aq) + 6H2O(l) → 4Fe2O3·3H2O(l). Additionally, we examine the dissociation of NaOCl in water, leading to the oxidation of chlorine, as well as the reduction processes involved in metal extraction, including reactions involving iron oxide and carbon.

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Redox Reactions in Everyday Life: From Corrosion to Metal Extraction

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  1. Redox Reactions Around Us Reaksi Redoks di Sekitar Kita

  2. 1. Corrosion of Iron Metal The rusting prosses in iron can be written in the following equation. 4 Fe(s) + O2(aq) + H2O(l)→ Fe2O3.3H2O(l) 3 6 2 -2 0 0 +3 OXIDATION REDUCTION

  3. 2. Clothes Bleaching When NaOCl dissolved, it is dissociated into ions, Na+ and OCl-, OCl- ion is reduced into chlorine ion and hydroxide ion 6 NaOCl + H2O → NaCl + NaOH+ O2+ Cl2 2 2 4 2 4 +1 -1 0

  4. 3. The Accumulator Electrocuting 2 2 2 Pb + PbO2 + H2SO4 PbSO4 + H2O 4. Redox Reaxtion in Metals Extraction Fe2O3 + CO→ Fe + CO2 2 3 3 Fe2O3 SiO2(s) + C(s)→ Si(s) + CO(g) 2 2

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