выполните преобразования
a) Ca → CaO → Ca(OH)2 → CaCL2 → CaSO4
б) Fe2O3 → FeCL3 → Fe(OH)3 → Fe2O3 → Fe2(SO4)2
a) Ca → CaO → Ca(OH)2 → CaCL2 → CaSO4
б) Fe2O3 → FeCL3 → Fe(OH)3 → Fe2O3 → Fe2(SO4)2
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Answers & Comments
Cao+h2o=Ca(oh)2
Ca(oh)2+2hcl=cacl2+2h20
Cacl2+h2so4=Caso4+2hcl
б) fe2o3+3hcl=2fecl3+3h20
Fecl3+naoh=fe(oh)3+ nacl
2fe(oh)3= Fe2o3+ 3h20
Fe2o3+3h2so4=fe2(so4)3+ 3h20