Question

5. Is the following a redox reaction? Justify your answer.
CaCO3 CO2 +CaO

Answer 1

CaCO3 → CO2 + CaO

Answer:

no because none of the oxidation numbers of the elements change

Step-by-step explanation:

redox = oxidation + reduction at the same time

oxidation = loss of electrons

reduction = gain of electrons

In this reaction, there is no change in the oxidation number of any of the elements

Answer 2

The given chemical equation: CaCO₃ → CO₂ + CaO represents the decomposition of calcium carbonate into carbon dioxide and calcium oxide. This is not a redox (oxidation-reduction) reaction. In a redox reaction, there is a transfer of electrons between species. However, in this equation, there is no change in oxidation states for any of the elements involved. Calcium (Ca) has an oxidation state of +2 in both CaCO₃ and CaO, while carbon (C) maintains an oxidation state of +4 in both CO₂ and CaCO₃. Therefore, there is no electron transfer occurring, and the given equation does not qualify as a redox reaction.