Биология
ОВР. Соединения хрома.
1. Cr2O3 + Br2 +NaOH→
2. Cr(OH)3 +Cl2 +NaOH→
3. CrCl3 +Br2 +KOH→
4. CrCl3 +H2O2 +NaOH→
5. Cr2(SO4)3 + Br2 +NaOH→
6. Cr2(SO4)3 +KMnO4 +KOH→
7. K2Cr2O7 + H2O2 +H2SO4→
8. K2Cr2O7 + Fe +H2SO4→