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Describe the work king of Daniel cell

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  • The Daniel cell is a typical galvanic cell. It is designed to make use of the spontaneous redox reaction between zinc and cupric ion to produce an electric current.
  • The Daniel cell can be conventionally represented as

    \begin{array}{c}{\mathrm{Zn}(\mathrm{s})\left|\mathrm{ZnSO}_{4}(\mathrm{aq})\right|\left|\mathrm{CuSO}_{4}(\mathrm{aq})\right| \mathrm{Cu}(\mathrm{s})} \\ {\text { Saltbridge }}\end{array}
  • The Daniel cell reaction is represented as

    \mathrm{Zn}(\mathrm{s})+\mathrm{Cu}^{2+}(\mathrm{aq}) \rightarrow \mathrm{Zn}^{2+}(\mathrm{aq})+\mathrm{Cu}(\mathrm{s})
  • In Daniel cell, electrons flow from zinc electrode to copper electrode through external circuit while metal ions flow form one half cell to the other through salt bridge.
  • Here current flows from copper electrode to zinc electrode that is, cathode to anode in external circuit.
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