Question

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1. Name two metals that can only be extracted from their ores by electrolysis.​

2. Zinc can be extracted from zinc oxide, ZnO, by heating with carbon.​
a. Write the balanced equation for this reaction.​

b. Explain why electrolysis is not used in the large-scale extraction of zinc.

Answer 1

Answer:

1. Some metals, however, can be extracted only from electrolysis. These are usually very reactive metals like Sodium, Potassium, Calcium etc. Therefore, electrolysis is the only viable way to extract these metals. Certain less reactive metals like Copper are purified using the electrorefining method.

2. In the following chemical reaction “zinc oxide reacts with carbon to produce zinc metal and carbon monoxide”. ZnO + C → Zn + CO. In the following chemical reaction “zinc oxide reacts with carbon to produce zinc metal and carbon monoxide.Electrolysis produces a very pure zinc, free of it's little brother cadmium and is slightly cheaper and less cumbersome than the thermal methods. ... In electroplating a thin film of nickel, chromium, cadmium copper or zinc is deposited on the surface to be protected by the process of electrolysis, why?

Explanation:

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