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n-factor of reaction , FeS2+O2 -> Fe2O3+SO2..? n-factor of FeS2?

n-factor of reaction , FeS2+O2 -> Fe2O3+SO2..?


n-factor of FeS2?

Grade:11

5 Answers

Sunil Kumar FP
askIITians Faculty 183 Points
7 years ago
For acids, n-factor is defined as the number of H+ions replaced by 1 mole of acid in a reaction.
For bases, n-factor is defined as the number of OH–ions replaced by 1 mole of base in a reaction.
The n-factor for salts which react such that no atom undergoes redox reaction is defined as the total moles of catioinic/anionic charge replaced in 1 mole of the salt.
n factor for FeS2 is 1
because in ferrous sulphide the oxidation number changes from +2 to +3
Ritesh Pratap Singh
11 Points
4 years ago
sorry, the answer u`ve given is wrong because here in FeS2,both Fe and S are oxidised. Fe from +2 to +3 and S from -1 to +4 therefore n factor of FeS2 is 11.
J Vijaya bhaskar Gowd
13 Points
4 years ago
the balanced reaction will be 4FeS2+11O2   ->   2Fe2O3+8SO2
 
It is a redox reaction.Number of electrons gained =Number of electrons lost.
1 mole of FeS2 = (11/4) moles of O2
Each O atom takes 2 electrons for reduction. Therefore for 1 O2 molecule 4 electrons are absorbed for reduction.
Therefore number of moles of electrons gained by O2 = (11/4)*4=11.
Therefore number of moles of electrons lost by 1 mole of FeS2=11 moles of electrons.
THerefore equivalent Weight of FeS2 in this reaction = molecular weight/11
Kashish
36 Points
4 years ago
            But how can you balance this reaction when the medium (acidic or basic) is not given? Please explain how balancing is done.
Rishi Sharma
askIITians Faculty 646 Points
one year ago
Dear Student,
Please find below the solution to your problem.

For acids, n-factor is defined as the number of H+ions replaced by 1 mole of acid in a reaction.
For bases, n-factor is defined as the number of OH–ions replaced by 1 mole of base in a reaction.
The n-factor for salts which react such that no atom undergoes redox reaction is defined as the total moles of catioinic/anionic charge replaced in 1 mole of the salt.
Hence n factor for FeS2 is 1 because in ferrous sulphide the oxidation number changes from +2 to +3
Thanks and Regards

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