Odpowiedź :
Ba(OH)2+H2SO4--->BaSO4+2H2O
Ba2+ +2OH- +2H+ +SO4 2- --->Ba2+ +SO4 2- +2H2O
2OH- +2H+ --->2H2O
Na2S+2 AgNO3--->Ag2S↓+2 NaNO3
2 Na+ +S2- +2 Ag+ +2 NO3- --->Ag2S↓+2 Na+ +2NO3-
S2- +2 Ag+ --->Ag2S↓
Ba(OH)2+H2SO4--->BaSO4+2H2O
Ba2+ +2OH- +2H+ +SO4 2- --->Ba2+ +SO4 2- +2H2O
2OH- +2H+ --->2H2O
Na2S+2 AgNO3--->Ag2S↓+2 NaNO3
2 Na+ +S2- +2 Ag+ +2 NO3- --->Ag2S↓+2 Na+ +2NO3-
S2- +2 Ag+ --->Ag2S↓