i need help w/ ions in solutions?!!!!???????

Question

it say's write the dissosiation equations for the following compounds that dissolve(in water). If they don't indecate so...
ex.NaCl(s)--H2O--Na(ag)+Cl(ag)
so i need help on
H2SO4=


Ba3(PO4)2=
JUST SHOW ME HOW TO DO IT
so i can do the rest plz plz plz!!!!!!!!!!!!!!!!!!!

Answer 1

H2SO4 in H2O --> 2H+(aq) + SO4-2(aq)
Ba3(PO4)2 in H2O --> 3Ba+2(aq) + 2PO4-2(aq)

actually H2SO4 goes in two steps:

H2SO4 in H2O --> H+(aq) + HSO4-(aq)

HSO4-(aq) --> H+(aq) + SO4-2(aq)

Answer 2

H2SO4---->H+(aq) + HSO4-(aq) --------> 2H+(aq) + SO4-(aq)

Not sure about the Barium Phosphate