The symbol for calcium is Ca, the symbol for sulfur is S, and the symbol for Calcium sulfide CaS. Which of the following best describes this chemical reaction? Ca (s) + S (s) --> CaS (s)?
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This is an oxidation-reduction (redox) reaction:
S0 + 2 e- → S-II (reduction)
Ca0 - 2 e- → CaII (oxidation)
S is an oxidizing agent, Ca is a reducing agent.
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