Galena (an ore) is partially oxidised by passing air through it at high temperature. After some time the passage of air stopped, but the heating is co
Galena (an ore) is partially oxidised by passing air through it at high temperature. After some time the passage of air stopped, but the heating is continued in a closed furnace such that the contents undergo self-reduction. The weight (in kg) of Pb produced per kg of `O_(2)` consumed is_ ,
`"Atomic weights in g mol"^(-1): O =16,S=32,Pb=207`
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It is an example of Auto-reduction of PbS. The reactions involved are :
`2PbS+3O_(2) to 2PbO+2SO_(2)`
`2PbO+PbS to 3Pb+SO_(2)`
3 moles of `O_(2)` produce Pb=3 mol.
96 kg of `O_(2)` produce `Pb=207xx3=621 kg`
1 kg of `O_(2)` produce `PB=(621)/(96)=6.47 kg`
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