7. Titanium can be extracted from its ore by two different methods. One uses a more reactive metal to displace the titanium:
TiO2 + 2 Mg -Ti + 2 Mgo
The second method is electrolysis of the ore. The overall reaction for this method is:
Tio, Ti + O2
a)
Calculate the atom economy for each reaction.
b)
Which method is 'greener'? What else might you want to know before making a final
decision?
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