2Сr+6HCL=2CrCl3 + 3H2
CrCl3+3NaOH(конц)=Cr(OH)3 + 3NaCl
2Cr(OH)3 ---t---> Cr2O3 + 3H2O
Cr2O3 + 2Al = Al2O3 + 2Cr
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2Сr+6HCL=2CrCl3 + 3H2
CrCl3+3NaOH(конц)=Cr(OH)3 + 3NaCl
2Cr(OH)3 ---t---> Cr2O3 + 3H2O
Cr2O3 + 2Al = Al2O3 + 2Cr