The remaining space between the electrolyte and carbon cathode is taken up by a second paste consisting of ammonium chloride and manganese dioxide, the latter acting as a depolariser.
2.
A "'depolarizer "'or "'depolariser "', in electrochemistry, according to an IUPAC definition, is a synonym of "'electroactive substance "', i . e ., a substance which changes its oxidation state, or partakes in a formation or breaking of chemical bonds, in a charge-transfer step of an electrochemical reaction.
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