Cr-crcl3-cr(oh)3-k9[cr(oh)6]-cr(so4)3-cr(oh)3-cr2o3-cro3-na2cro4-na2cr2o7 - вопрос №3396433233242272550828 от ac123sjdjhdndndndh 27.06.2020 18:42

Question

Химия: Cr-crcl3-cr(oh)3-k9[cr(oh)6]-cr(so4)3-cr(oh)3-cr2o3-cro3-na2cro4-na2cr2o7

ac123sjdjhdndndndh · Answer

Cr-- Cr2O3-- Cr-- CrCl3-- Cr(OH)3-- Cr2(SO4)3 4Cr + 3O2 = 2Cr2O3 2Cr2O3 = 4Cr + 3O2 2Cr+3Cl2=2CrCl3 CrCl3+3NaOH=Cr(OH)3+3NaCl 2Cr(OH)3+3H2SO4=Cr2(SO4)3+6H2OCr2(SO4)3 + 6KOH = 2Cr(OH)3 + 3K2SO42Cr(OH)3=Cr2O3+3H2O 4СrO3 → 2Cr2O3 + 3O2↑CrO3 + NaOH = H2O + Na2CrO4Na2CrO4 + Н2SO4 = Na2Cr2O7 + Н2О + Na2SO4...