Application of Principles c) What causes an electric current in a solution? 1. A Simple Daniell Cell Complete the diagram below by writing in formulas for the composition of the electrodes and of the ions in the solutions. Place these formulas near the appropriate arrows leading into the solutions. Also indicate the electric charge which is produced by a (+) or ) sign near the top of each electrode. d) Indicate the direction of movement of these particles in the solution by placing their formulas on the proper arrow below the sketch. sodó e) Why must there be actual contact of the two solutions? ) What is the half-reaction taking place at the negative electrode? g) What is the half-reaction taking place at the positive electrode? h) What is the overall cell reaction? i) What is the calculated standard potential of the Daniell cell? Answer the following questions regarding the Daniell cell you have drawn in your notebook. a) What particle is responsible for an electric current in a wire? ) How would you adjust the concentrations of the Cu2+ and of the Zn2* in the Daniell cell in order to obtain the maximum voltage possible? b) Indicate the direction of flow through the wire of these particles by drawing an arrow over each wire.

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