Odpowiedź :
siarczek magnezu
1. H2S+Mg(OH)2--->MgS+2H2O
2. H2S+Mg--->MgS+H2
3. H2S+MgO--->MgS+H2O
siarczan(VI)wapnia
1. H2SO4+Ca(OH)2--->CaSO4+2H2O
2. H2SO4+Ca--->CaSO4+H2
3. H2SO4+CaO--->CaSO4+H2O
siarczek magnezu
1. H2S+Mg(OH)2--->MgS+2H2O
2. H2S+Mg--->MgS+H2
3. H2S+MgO--->MgS+H2O
siarczan(VI)wapnia
1. H2SO4+Ca(OH)2--->CaSO4+2H2O
2. H2SO4+Ca--->CaSO4+H2
3. H2SO4+CaO--->CaSO4+H2O