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Can Copper Sulphate Solution Be Stored in an Iron Vessel? Explain. - Chemistry

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Can copper sulphate solution be stored in an iron vessel? Explain.

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Solution

Higher the standard reduction potential (Eº) value, greater the tendency of the species to accept electrons and undergo reduction.

Cu2++2e-→Cu,    Eº = + 0.337 V ;  Fe2+ + 2e- → Fe, Eº = - 0.440 V

Therefore, Cu2+ has a greater tendency to undergo reduction than Fe2+ or Fe can reduce (or displace) Cu2+ ions from its salt solution.

Fe(s) +Cu2(aq) → Fe2(aq) + Cu(s)

Hence, copper sulphate solution cannot be stored in an iron vessel as the iron vessel dissolves forming Fe2+ ions and Cu2+ ions from copper sulphate solution forms Cu.

Concept: Galvanic Cells - Introduction
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