NCERT Class XII Chemistry
Chapter - General Principle of Process of Isolation of Elements
Questions with Solutions
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Question : 17
Total: 31
Why copper matte is put in silica lined converter ?
Solution:
Copper matte consists of C u 2 S and FeS . When a blast of hot air ispassed through molten matte taken in a silica lined converter, FeS presentin matte is oxidised to FeO which combines with silica ( S i O 2 ) to formF e S i O 3 (slag).
2 F e S + 3 O 2 – – – – – – ▶ 2 F e O + 2 S O 2
F e O + S i O 2 – – – – – – ▶ F e S i O 3
When complete iron has been removed as slag, some of theC u 2 S undergoesoxidation to form C u 2 O which then reacts with more C u 2 S to form coppermetal.
2 C u 2 S + 3 O 2 – – – – – – ▶ 2 C u 2 O + 2 S O 2
2 C u 2 O + C u 2 S – – – – – – ▶ 6 C u + S O 2
Thus, copper matte is heated in silica lined converter to remove FeSpresent in matte asF e S i O 3 (slag).
When complete iron has been removed as slag, some of the
Thus, copper matte is heated in silica lined converter to remove FeSpresent in matte as
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