Question

2 ca + o2 = 2 cao is which reaction​

Answer 1

Answer:

Combination reaction

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Answer 2

Redox Rxn:

2Ca(0) + O2 (0) →2Ca(2+)O(2-)

(The numbers in the parantheses are the oxidation number for each element. These oxidation numbers can be known by knowing the periodic table and the degree of electronegativity for the known and widely used atoms.)

Half rxns:

2Ca (0) →2Ca(+2) + 4e- (Reducing Agent = Oxidation half-reaction

O2 (0) + 4e- → 2O (2-) (Oxidizing Agent = Reduction half-reaction)

SO AT THE CONCLUSION,WE COULD SAY THAT IT IS A REDUCING REACTION.