Question

In the refining of silver, the recovery of silver from silver nitrate solution involved displacement by copper metal. Write down the chemical equation of the reaction involved.

Answer 1

$AgNO_{3}+Cu-->CuNO_{3}+Ag$

Explanation:

• Silver is commercially a very important substance. One of the most important ways to generate this would be the treatement of silver nitrate solution with copper.
• This reaction is carried on by because the reducing power of copper is more than  that of silver.
• This type of reactions are called single displacement reactions.
• The valence state of silver is +1 and that of copper is also +1.
• This reaction is as follows,

$AgNO_{3}+Cu-->CuNO_{3}+Ag$

Hence this is the required reaction.

Answer 2

Chemical reaction in silver refining:

$\bold{C u_{s}+2 A g N O_{3(a q)} \rightarrow C u\left(N O_{3}\right)_{2(a q)}+2 A g_{(s)}}$

Explanation:

• The refining is a process which is used to remove the impure metal present in the solution.
• In the above given process, the copper is the impurity found in silver nitrate.
• As a result of this process, only silver metal is obtained.
• There are many types of refining which includes hydrometallurgical and pyrometallurgical techniques.
• During extraction of ores, this is the final step involved as it produced pure form of the particular product.

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