Finding The Oxidation Numbers for The Elements in CaCO₃


Finding The Oxidation Numbers for The Elements in CaCO₃

Find the oxidation number for each element in CaCO₃. The key elements are Ca and O. Iron has a +2 oxidation number. Oxygen has a -2. Therefore, the oxidation number for C must be calculated. The algebraic equation is Ca + C +3(O) = 0. The +2 replaces the Ca and the -2 replaces the O in the algebraic equation. The equation now appears as ⁺2 + C + 3(-2) = 0. This gives ⁺2 + C + ⁻6 = 0. Simplifiying the equation gives C + ⁻4 = 0. To solve for the oxidation number for C, ⁺4  is added to both sides. This gives C = +4.  The +4 is a common oxidation number for carbon.   



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