Question

The following sequence of reactions may be used to extract zinc from its sulphide are

2ZnS + 3O₂® 2ZnO + 2SO₂

ZnO + C ® Zn + CO

How many tans of Zn can be obtained from 10 tans of ZnS, assuming that the yield is 75%?

(Zn = 65.3 & S = 32)

• A. 5
• B. 10
• C. 12
• D. 15

Answer 1

Answer: (A)

5

Answer 2

$\frac { 10 } { 97.3 }$ × $\frac { 75 } { 100 }$= $\frac { w } { 65.3 }$

w ≅ 5 tan