Which of the following reactions of calcium compounds is /...

Which of the following reactions of calcium compounds is $/$ are redox reactions? a. $\quad \mathrm{CaCO}_{3}(s) \rightarrow \mathrm{CaO}(s)+\mathrm{CO}_{2}(g)$ b. $\mathrm{CaO}(s)+\mathrm{SO}_{2}(g) \rightarrow \mathrm{CaSO}_{3}(s)$ c. $\mathrm{CaCl}_{2}(s) \rightarrow \mathrm{Ca}(s)+\mathrm{Cl}_{2}(g)$ d. $3 \mathrm{Ca}(s)+\mathrm{N}_{2}(g) \rightarrow \mathrm{Ca}_{3} \mathrm{N}_{2}(s)$

Which of the following reactions of calcium compounds is $/$ are redox reactions?
a. $\quad \mathrm{CaCO}_{3}(s) \rightarrow \mathrm{CaO}(s)+\mathrm{CO}_{2}(g)$
b. $\mathrm{CaO}(s)+\mathrm{SO}_{2}(g) \rightarrow \mathrm{CaSO}_{3}(s)$
c. $\mathrm{CaCl}_{2}(s) \rightarrow \mathrm{Ca}(s)+\mathrm{Cl}_{2}(g)$
d. $3 \mathrm{Ca}(s)+\mathrm{N}_{2}(g) \rightarrow \mathrm{Ca}_{3} \mathrm{N}_{2}(s)$

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Key Concepts

Reaction Analysis

Reaction analysis involves examining the chemical equation to check for changes in oxidation states of the elements involved. By identifying any shifts in these values between the reactants and products, one can determine if a reaction is a redox process.

Electron Transfer

Electron transfer is the movement of electrons from one species to another during a reaction. This concept is fundamental to redox reactions, as the gain and loss of electrons correspond to reduction and oxidation processes, respectively.

Oxidation States

Oxidation states are theoretical charges assigned to atoms in a compound, reflecting the electron distribution in chemical bonds. Tracking the changes in oxidation states from reactants to products is essential to determine whether a redox process has occurred.

Redox Reactions

Redox reactions, or oxidation-reduction reactions, are chemical processes in which electrons are transferred between reactants. One substance undergoes oxidation (loss of electrons) while another undergoes reduction (gain of electrons), making these electron transfer events central to identifying such reactions.

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