10Cr+36HNO3(t,)=10Cr(NO3)3+3N2+18H2O
Cr(NO3)3+Na2CO3+3H2O=Cr(OH)3+3NaNO3+3NaHCO3
Cr(OH)3+3NaOH=Na3[Cr(OH)6]
2Na3[Cr(OH)6]+3Cl2+4NaOH=2Na2CrO4+6NaCl+8H2O
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