Question

$N{a}_{2}C{O}_3$ is used in one of the steps during the extraction process of silver from silver coin.
State true or false

• A. true
• B. false
• C. cannot be determined
• D. none of the above

Answer 1

The correct option is A true

The statement is true.

$N{a}_{2}C{O}_3$ is used in one of the steps during the extraction process of silver from silver coin.

The specific extractive metallurgy processes applied to a silver-bearing mineral concentrate depend on whether the major metal is copper, zinc, or lead.

The smelting and converting of copper sulfide concentrates result in a “blister” copper that contains 97 to 99 percent of the silver present in the original concentrate.This metal is cast to form anodes and electrolyzed in a solution of silver-copper nitrate. Upon electrolytic refining of the copper, insoluble impurities, called slimes, gradually accumulate at the bottom of the refining tank. These contain the silver originally present in the concentrate but at a much higher concentration.

Silver coin $\underset{HN{O}_3}{\overset{boilwith}{\to }}AgN{O}_3+Cu\left(N{O}_3\right)$ etc.$\stackrel{NaCl}{\to }AgCl\downarrow$ (other remain soluble)

$\stackrel{N{a}_{2}C{O}_3}{\to }A{g}_{2}C{O}_3\downarrow \stackrel{\Delta }{\to }Ag$