Question

Given the redox reaction: Ni + Sn4+ → Ni2+ + Sn2+

Which species has been oxidized?

Ni
Sn4+
Ni2+
Sn2+

Answer 1

1. Na
2. Ni
3. Na2S
4. Electrolytic Cell (Galvanic and Voltaic are synonyms, both are electric cells without an external power source.
5. 3
6. The first one
7. Na
8. Reducing agents are oxidized
hope this helps you

Answer 2

Answer: Ni

Explanation: Oxidation-reduction reaction or redox reaction is defined as the reaction in which oxidation and reduction reactions occur simultaneously.

Oxidation reaction is defined as the reaction in which a substance looses its electrons. The oxidation state of the substance increases.

`Ni\rightarrow Ni^(2+)+2e^-`

Reduction reaction is defined as the reaction in which a substance gains electrons. The oxidation state of the substance gets reduced.

`Sn^(4+)+2e^-\rightarrow Sn^(2+)`

The oxidation state of nickel increases from 0 to +2, it is getting oxidized and it undergoes oxidation reaction.