K2CR2O7+ 6FESO4+ 7H2SO4→ K2SO4+ CR2(SO4)3+ 3FE2(SO4)3+ 7H2O K2C...
15. K
2
Cr
2
O
7
+ 6FeSO
4
+ 7H
2
SO
4
→ K
2
SO
4
+ Cr
2
(SO4)
3
+ 3Fe
2
(SO
4
)
3
+ 7H
2
O
1x (2Cr
+6
+ 6e → 2Cr
+3
)
3x (2Fe
+2
– 2e → 2Fe
+3
2
2
7
4
2
4
2
4
2
3
2
4
3
2
+6
+3
+2
+3