January 2019 1 427 Report
Uzgodnij współczynniki w następujących reakcjach:
1. Cr2O3 + KNO3 + KOH => K2CrO4 + KNO2 + H2O
2. K2Cr2O7 + H2S + H2SO4 => K2SO4 + Cr2(SO4)3 + S + H2O
3. K2Cr2O7 + SnCl2 + HCl => CrCl3 + SnCl4 + KCl + H2O
4. CrCl3 + Cl2 + KOH => K2CrO4 + KCl + H2O
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