Question

[cr(nh3)6]2(so4) + h2o2 + koh= 

Answer 1

1) 3Mg + N2 = Mg3N2 

2) Mg3N2 + 6H2O = 2NH3 + 3Mg(OH)2

3) 6NH3 + Cr2(SO4)3 + H2O(т.к. водный раствор в условии) = 2Cr(OH)3 + 3(NH4)2SO4 

4) 2Cr(OH)3 + H2O2 + 4KOH = O2 + 2K2CrO2 + 6H2O