Low grade Cu ores are available and Zn and Fe | vedclass

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(B) The extraction of $Cu$ from low-grade ores is done by hydrometallurgy,where the ore is leached with acid or bacteria. The resulting solution conta

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$Fe$ scraps

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(B) The extraction of $Cu$ from low-grade ores is done by hydrometallurgy,where the ore is leached with acid or bacteria. The resulting solution contains $Cu^{2+}$ ions. To recover $Cu$ metal,we use a more reactive metal to displace $Cu$ from the solution. The reaction is: $Cu^{2+}(aq) + M(s) \rightarrow Cu(s) + M^{2+}(aq)$. Both $Zn$ and $Fe$ can displace $Cu$ because they are more reactive than $Cu$. However,$Fe$ is much cheaper and more abundantly available as scrap compared to $Zn$. Therefore,$Fe$ scrap is more economically suitable for the reduction of leached $Cu$ ore.

Low grade $Cu$ ores are available and $Zn$ and $Fe$ scraps are also available. Which scrap among the two would be more suitable for reducing the leached $Cu$ ore (economically)?

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