IMG_37936641EFB7-1.jpeg

# The Daniell Element In this simulation, the copper-zinc element (Daniell element) is demonstrated. For this purpose, a zinc and a copper sheet are immersed in their corresponding ion solutions: zinc in zinc sulfate and copper in copper sulfate. Zinc is less noble than copper and the solution tens...

# The Daniell Element In this simulation, the copper-zinc element (Daniell element) is demonstrated. For this purpose, a zinc and a copper sheet are immersed in their corresponding ion solutions: zinc in zinc sulfate and copper in copper sulfate. Zinc is less noble than copper and the solution tension is greater. Therefore, at the zinc sheet, relatively many zinc ions go into solution, i.e. zinc atoms are converted to Zn²⁺ cations. The electrons remain in the zinc sheet (electron excess), which becomes negatively charged as a result. From the copper sheet, only a few Cu²⁺ cations dissolve. A cable connecting the sheets with a multimeter allows the flow of electrons to the copper sheet. The Cu²⁺ cations of the copper sulfate absorb these electrons and deposit as elemental copper on the sheet, i.e. the Cu²⁺ cations are reduced. Since positively charged Zn²⁺ cations are in solution on the left and copper deposits on the right, a charge balance must occur. To enable this electrical current flow, the two half-cells are connected by a salt bridge, which is implemented using filter paper soaked in potassium chloride. SO₄²⁻ anions migrate to the left and Zn²⁺ cations to the right.