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25 March, 13:31

Write a balanced chemical equation, including physical state symbols, for the decomposition of solid calcium carbonate (CaCO_3) into solid calcium oxide and gaseous carbon dioxide.

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Answers (2)
  1. 25 March, 13:43
    0
    CaCO3 (s) → CaO (s) + CO2 (g)

    Explanation:

    Step 1: Data given

    Solid calcium carbonate = CaCO3 (s)

    solid calcium oxide = CaO (s)

    gaseous carbon oxide = CO2 (g)

    Step 2: The unbalanced equation

    CaCO3 (s) → CaO (s) + CO2 (g)

    This equation is already balanced. We don't have to balance anything.

    The balanced equation is:

    CaCO3 (s) → CaO (s) + CO2 (g)
  2. 25 March, 13:55
    0
    CaCO₃ (s) → CaO (s) + CO₂ (g)

    Explanation:

    The decomposition reaction always make two compounds from one.

    The products always have simpler chemical structure, originated from a determined compound. This can happens spontaneously or by a third party.

    A notable example of decomposition is hydrolysis. As for example the case of water, which decomposes and generates oxygen and hydrogen gas

    2H₂O (l) → 2 H₂ (g) + O₂ (g)

    In this case, the calium carbonate decomposes into CaO and CO₂

    These two, are the products of the decomposition.

    Of course, the unique reactant is the Calcium Carbonate

    The balanced equation is:

    CaCO₃ (s) → CaO (s) + CO₂ (g)
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