Question

Как из FeS2 получить  S?

Answer 1

4FeS2+11O2=8SO2+2Fe2O3
SO2=S+O2

Answer 2

да. она возможна при t = 2500°C ))

Answer 3

FeS2 + 4HNO3 (разб.) = Fe(NO3)3 + 2S + NO + 2H2O, баланс:

Answer 4

Fe+2 -e- = Fe3+

Answer 5

(S2)2- -2e- = 2S | 3 | 3 | 1 |

Answer 6

N+5 +3e- = N+2 | 3 | | 1 |.

Answer 7

4FeS2+11O2=2Fe2O3+8SO2