A dry cell is constructed using the following substances. Zinc metal, graphite rod, ammonium chloride paste and manganese (IV) oxide mixed with carbon powder. (a) State...

      

A dry cell is constructed using the following substances. Zinc metal, graphite rod, ammonium chloride paste and manganese (IV) oxide mixed with carbon powder.
(a) State the roles of:
(i) Ammonium chloride paste.
(ii) Manganese (IV) oxide mixed with carbon powder.
(b) Given that:
c29320191205.png
Calculate the e m f of the cell given zinc forms the negative electrode.

  

Answers


sharon
a)(i) Electrolyte for facilitating flow/movement of ions from one electrode to the other. (1mk)
(ii) Oxidizing hydrogen gas liberated to prevent polarization of the cell and enable contact with electrolyte for electron flow in the external circuit to be achieved.
c29320191201.png
sharon kalunda answered the question on March 29, 2019 at 09:07


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