Question

.  Осуществите цепочку превращений:

                         а) AI         AI2O3          AI(OH)3        AI2(SO4)3         AICI3

                         б) H2           HBr            NaBr            CaBr2              Ca(OH)2

Answer 1

а) 4al+3o2=2al2o3
   al2o3+3h2o=2al(oh)3
   2al(oh)3+3h2so4==al2(so4)3 + 6h2o
   al2(so4)3+3bacl2==2alcl3+3baso4

б) H2+br2= 2Hbr
   Hbr+naoh=nabr+h2o
   2nabr+caco3=na2co3+cabr2
   cabr2+2naoh=ca(oh)2+nabr2