Solving a problem in chemistry section 7 point 78

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78. If a plate of pure zinc dipped in dilute acid, the release of hydrogen begins soon almost terminated. However, when you touch the copper zinc wand at last begins the rapid evolution of hydrogen. Give an explanation for this, making electronic equation of anodic and cathodic processes. Write the equation of chemical reactions.

Detailed solution. Decorated in Microsoft Word 2003. (Target decided to use formula editor)

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