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stabiliti coeficientii
FeCl3 + HCl + Zn = FeCl2+ZnCl2+HCl
KMnO4 + HCl = MnCl2 + KCl + H2O+Cl2
K2Cr2O7 + H2SO4 + HCl = Cr2(SO4)3 + K2SO4 + H2O + Cl2
KBr + K2Cr2O7 + H2SO4 = K2SO4 + Cr2(SO4)3 + H20+ Br2