↗ CrO→CrSO₄→Cr(OH)₂ Сr ↘CrCl₃→Cr(OH)₃→Cr₂O₃

Question

↗ CrO→CrSO₄→Cr(OH)₂

Сr

↘CrCl₃→Cr(OH)₃→Cr₂O₃

Answer 1

2Cr + O2 ---2CrO

CrO+H2SO4----CrSO4+h2o

CrSO4+2NaOH ----Cr(OH)2+Na2SO4

2Cr+6HCl------2CrCl3 +3H2

CrCl3+3NaOH----Cr(OH)3+3NaCl

2Cr(OH)3-+ t° ----Cr2O3 + H2O