1) 2Cr+3Cl2=2CrCL3
2) CrCl3+3NaOH=Cr(OH)3+3NaCL
3) 2Cr(OH)3=Cr2O3+3H2O
4) Cr2O3+3H2SO4=Cr2(SO4)3+3H2O
5)Cr2(SO4)3+6HF=2CrF3+3H2SO4 - не уверен!
1)Cr+2HCl=CrCL2+H2
2)CrCl2+2NaOH=Cr(OH)2+2NaCl
1) 2Cr+3Cl2=2CrCL3
2) CrCl3+3NaOH=Cr(OH)3+3NaCL
3) 2Cr(OH)3=Cr2O3+3H2O
4) Cr2O3+3H2SO4=Cr2(SO4)3+3H2O
5)Cr2(SO4)3+6HF=2CrF3+3H2SO4 - не уверен!
1)Cr+2HCl=CrCL2+H2
2)CrCl2+2NaOH=Cr(OH)2+2NaCl