0

Guest

Courses New

Suggest a condition under which magnesium could reduce alumina?

Suggest a condition under which magnesium could reduce alumina?

Grade:

6 Answers

Gaurav
askIITians Faculty 164 Points
9 years ago
Temperatures below the point of intersection of Al2O3and MgO curves, magnesium can reduce alumina. But the process will be uneconomical.
MagO can reduce Al2O3 at any tempeerature below 1400 0C
Priya
11 Points
7 years ago
1. The reaction: 3 Mg + Al2O3 → 2 Al + 3 MgO2. On studying the Ellingham diagram we see that point of intersection, below which ∆G for the above reaction is negative is above 2000 K.3. Thus, this reaction is feasible at a very high temperature.
Gomati
20 Points
6 years ago
4/3Al+O2->2/3Al2O3 and 2Mg+O2->2MgO
At the point of intersection of Al2O3 and MgO curves , the ∆G becomes zero for the reaction 2/3Al2O3+2Mg->2MgO+4/3Al . Below that point magnesium can reduce alumina.
Gomati
20 Points
6 years ago
The above answer is the best answer u can find ever.............. So please refer only this.....
All the very best for all who refer this website
Gaurav jaiswal
13 Points
5 years ago
in ncert the answer is given wrong.
magnesium can reduce alumina below the  point of the intersection . 
But, magnesium is not used in metallurgy of aluminium because magnesium is costlier than aluminium .
Dr Haseena
15 Points
4 years ago
Mg reduces al when Gibbs free energy change of MgO formation is more negative than alumina formation.  
This is below the point of intersection

Think You Can Provide A Better Answer ?

Other Related Questions on Physical Chemistry

View all Questions »

ASK QUESTION

Get your questions answered by the expert for free

Answer and earn gift vouchers

Win Gift vouchers upto Rs 500/-

View courses by askIITians

Design classes One-on-One in your own way with Top IITians/Medical Professionals

Click Here Know More

Complete Self Study Package designed by Industry Leading Experts

Click Here Know More

Live 1-1 coding classes to unleash the Creator in your Child

Click Here Know More

a Complete All-in-One Study package Fully Loaded inside a Tablet!

Click Here Know More