Na plus or Al 3plus, Al 3+ has greater coagulating power
Cl- or SO4^2- , SO4^2- has greater coagulating power.
Look at their net charges
Na+ has one charge
Al3+ has three
so Al3+ has greater coagulating power.
Cl- has one charge
SO4^-2 has two.
so SO4^2- has greater coagulating power
Al2O3 + H2SO4 = Al2(SO4)3 + H2O
Na+1 and I-1; the Ba+2 and SO4-2 precipitate as BaSO4.
The ion MnO4 is reduced toMnO2 and sulfur is oxidized to ion sulfate. Sulfite is the reducing agent.
The oxydation state for S in (SO4)2- is 6.
SO4-2 is the polyatomic ion sulfate.
Ammonium chloride
S in (SO4)-2 has a charge of +6, in SO2 S has a charge of +4. To go from +6 to +4 you must gain two electrons. The (SO4)-2 is reduced (reduction is gaining electrons). Therefore it reduces the 2br-, so (SO4)-2 is the reducing agent
Ba2(SO4)2
2SO2 + O2 + 2H2O -------> 2H2SO4
(NH4)2SO4
Al2O3 + H2SO4 = Al2(SO4)3 + H2O
2In + 3H2SO4 --> In2(SO4)3 + 3H2
Au(III)SO4,BaSO4
mg+cuso4 gives mgso4+cu2+
3Ag2SO4 + 2AlCl3 -> 6AgCl + Al2(SO4)3
Hg(NH4)2 + SO4(NO3)2
SO4 is not a molecule. (SO4)2- is the sulfate ion.