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Marta_Voda [28]
3 years ago
12

Describe how oxidation and reduction involve electrons, change oxidation numbers, and combine in oxidation reduction reactions

Chemistry
1 answer:
borishaifa [10]3 years ago
4 0

Answer: Oxidation is defined as the reaction in which there is loss of electrons. It is accompanied by increase in oxidation number.

Zn\rightarrow Zn^{2+}+2e^{-}

Zinc in solid state has oxidation number of zero and on losing electrons changes to Zn^{2+} with oxidation number of +2.

Reduction is defined as the reaction in which there is gain of electrons. It  is accompanied by decrease in oxidation number.

2H^++e^{-}\rightarrow H_2

Hydrogen ions with +1 oxidation state gains electrons and converts to molecular hydrogen with oxidation state of zero.

In the given redox reaction, both oxidation and reduction takes place. They go hand in hand.

Zn+H_2SO_4\rightarrow ZnSO_4 +H_2

Zinc converts to Zn^{2+} and gets oxidized. H^+ gains electron and convert to H_2.




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When a plastic solid (whose particle is tightly packed and have a restricted movement/no movement) is placed near a heat source, <u>it's particles gains energy in the process and starts to move (though slightly free) and become less tightly packed</u> hence the reason it is observed that plastic solids near a heat source melts.

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