71. Determine the emf of a galvanic cell formed by electrodes Pb / Pb2 (at C Pb2 \u003d 0.12 mol / l) and Zn / Zn2 (at C Zn2 \u003d 0.2 mol / l). The obtained EMF value is compared with the EMF value calculated on the basis of standard electrode potentials.

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