Question

The following sequences of reaction may be used to extract zinc from its sulphate are:
Zns+O2→ZnO+SO2
ZnO+C→Zn+CO
How many tonnes of Zn can be obtained from 10 tonnes of Zns assuming that the yield is 75%? [Atomic weight of Zn = 65, S = 231]

Answer 1

Explanation:

step 1:- find the moles of ZnS using given data.

step 2:- As we've given that yield is 75%.

So, no. of moles of ZnO = 75% of moles of ZnS ( from 1st reaction)

step 3:- no. of moles of Zn = no. of moles of ZnO ( from 2nd reaction)

step 4:- using moles of Zn, find the amount (mass in tonnes) of Zn obtained.