Ändern Sie folgende Reaktionsgleichung so, dass sie wieder stimmt:?

FeS2 + O2 ⟶ Fe2O3 + SO2

This reaction equation describes (if it is correct) the roasting of pyrite. This is a redox reaction; so you can trick this with oxidation numbers and electron balances (and who you want, then I would like to show you); On the other hand, the reaction is so simple that it can also be completed step by step very simply.

Each Fe atom appears on the left as FeS2 and on the right as Fe2O3 so we know that on the left twice as much FeS2 as on the right Fe2O3 must appear:

2 FeS2

In addition, the S atoms must appear to the right as SO2:

2 FeS2 = Fe2O3 + 4 SO2

Now we just need to correct the O-Bilance

2 FeS2 + 51⁄2 O2 ⟶ Fe2O3 + 4 SO2

and if you prefer integer coefficients, you simply multiply by 2:

4 FeS2 + 11 O2 ⟶ 2 Fe2O3 + 8 SO2