Question

Write the half reaction that take place at the anode and at the cathode of the galvanic cell G1

Answer 1

Concept:—

If zinc rod is dipped in copper sulphate solution. The redox reaction takes place and during the reaction, zinc is oxidized to zinc ions and copper ions are reduced to metallic copper due to direct transfer of electrons from zinc to copper ion. During this reaction heat is involved.

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Reaction:—

★On the cathode reduction takes place

• $\sf{Oxidant +ne^{-}\longrightarrow\:Reductant}$

•$\sf{Example\:Cu^{+}+2e^{-}\longrightarrow\:Cu}$

•Cu2+ is oxidizing agent and Cu is reducing agent.

★ On the anode Oxidation takes place

•$\sf{Reductant\longrightarrow\:oxidant+ne^{-}}$

•$\sf{Example\:Zn\longrightarrow\:Zn^{2+}+2e^{-}}$

• Zn is reducing agent and Zn2+ is oxidizing agent.

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