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7 February, 06:18

10 Given the balanced ionic equation representing a reaction:

Zn (s) + Co2 + (aq) → Zn2 + (aq) + Co (s)

Which statement describes the electrons involved in this

reaction?

A) Each Zn atom loses 2 electrons, and each Co2 + ion gains 2

electrons.

B) Each Zn atom loses 2 electrons, and each Co2 + ion loses 2

electrons.

C) Each Zn atom gains 2 electrons, and each Co2 + ion loses 2

electrons.

D) Each Zn atom gains 2 electrons, and each Co2 + ion gains 2

electrons.

+4
Answers (1)
  1. 7 February, 06:31
    0
    Option (A) Each Zn atom loses 2 electrons, and each Co2 + ion gains 2

    Explanation:

    To know the right answer to the question, let us observe the changes in the oxidation number of Zn and Co. This is illustrated below:

    Zn (s) + Co2 + (aq) → Zn2 + (aq) + Co (s)

    The oxidation number of Zn changes from 0 to + 2 indicating that Zn has lose 2 electrons.

    The oxidation number of Co changes from + 2 to 0 indicating that Co has gain 2 electrons.

    Therefore, option A is the correct answer.
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