K2CrO4 → K2Cr2O7 → K2CrO4 → BaCrO4
1)2K2CrO4 + 2HCl = K2Cr2O7 + 2KCl + H2O
2)4K2Cr2O7 ==== 2Cr2O3 + 4K2CrO4 + 3O2
3)K2Cr2O7 + BaCl2 = BaCr2O7(осадок) + 2KCl
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Verified answer
1)2K2CrO4 + 2HCl = K2Cr2O7 + 2KCl + H2O
2)4K2Cr2O7 ==== 2Cr2O3 + 4K2CrO4 + 3O2
3)K2Cr2O7 + BaCl2 = BaCr2O7(осадок) + 2KCl