1) 2Cr + 3CaCl2 = 2CrCl3 + 3Ca
2) CrCl3 + 3NaOH = Cr(OH)3↓ + 3NaCl
3) 2Cr(OH)3 = Cr2O3 + 3H2O
4) Cr2O3 + 3K2S2O7 = Cr2(SO4)3 + 3K2(SO4)3
5) Cr2(SO4)3 + 3Br2 + 16KOH = K2Cr2O7 + 3K2SO4 + 6KBr + 8H2OОтвет:
Объяснение:
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1) 2Cr + 3CaCl2 = 2CrCl3 + 3Ca
2) CrCl3 + 3NaOH = Cr(OH)3↓ + 3NaCl
3) 2Cr(OH)3 = Cr2O3 + 3H2O
4) Cr2O3 + 3K2S2O7 = Cr2(SO4)3 + 3K2(SO4)3
5) Cr2(SO4)3 + 3Br2 + 16KOH = K2Cr2O7 + 3K2SO4 + 6KBr + 8H2OОтвет:
Объяснение:
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