General Principles And Processes Of Isolation Of Metals Question 7
Question 7 - 30 January - Shift 1
In the extraction of copper, its sulphide ore is heated in a reverberatory furnace after mixing with silica to :
(1) separate $CuO$ as $CuSiO_3$
(2) remove calcium as $CaSiO_3$
(3) decrease the temperature needed for roasting of $Cu_2 S$
(4) remove $FeO$ as $FeSiO_3$
Show Answer
Answer: (4)
Solution:
Formula: Extraxtion of Copper
The copper ore contains iron, it is mixed with silica before heating in reverberatory furnace. FeO slags off as $FeSiO_3$.
$ FeO+SiO_2 \longrightarrow FeSiO_3 $
