Question

cr=crcl3=cr(oh)3= cr2o3=cr

Answer 1

1) 2Cr+6HCL=2CrCl₃+3H₂

2) 2CrCl₃+3NaOH=Cr(OH)₃ + 3NaCl

3) 2Cr(OH)₃ $\frac{t}{=}$ Cr₂O₃ + 3H₂O

4) Cr₂O₃ + 2Al = Al2O3 + 2Cr