Q. 21 A4.0( 6 Votes )
Given below are the steps for extraction of copper from its ore. Write the reaction involved.
a. Roasting of copper (I) Sulphide
b. Reducing of copper (I) oxide with copper (I) sulphide
c. Electrolytic refining
Roasting is the process by which sulphide ores are concentrated. The sulphides ores are converted into oxides by heating strongly in the presence of excess air. This process is known as roasting. The reaction is given below:
2ZnS + 3O2 + Heat → 2ZnO + 2SO2
The carbonates ores are changed into oxides by heating strongly in the presence of excess air. This process is known as calcination. The reaction is given below:
ZnCO3 + Heat → ZnO + 2CO2
c. Electrolytic refining:
Many metals such as copper, zinc, silver, gold, copper are refined electrolytically. For example:
At cathode: Cu2+ + 2e-→ Cu
At anode: Cu → Cu2+ + 2e-
Rate this question :
Name the method used for the purification of metals of high reactivity. What does a blue flame of burner indicates?All In One Science
(a) Write the steps involved in the extraction of pure metals in the middle of the activity series from their carbonate ores.
(b) How is copper extracted from its sulphide ore? Explain the various steps supported by chemical equations. Draw labelled diagram for the electrolytic refining of copper.
Science - Board Papers