Mg->MgCl2->Mg(OH)2

Na → Na2O → NaOH

Ca -> CaO -> Ca(OH)2

K ->KOH


ПОМОГИте

Mg+Cl2=MgCl2MgCl2+2NaOH=Mg(OH)2+2NaCl4Na+O2=2Na2ONa2O+H2O=2NaOH2Ca+O2=2CaOCaO+H2O=Ca(OH)22K+2H2O=2KOH+H2