Which produces the greatest number of ions

when one mole dissolves in water?
(A) NaCl (B) NH4Cl
C) NH4NO3 (D) Na2SO4

1 answer

How do these things ionize?
NaCl ==> Na^+ + Cl^-. Two ions produced
NH4Cl ==> NH4^+ + Cl^-. Two ions.
You do the others. I'll be glad to check your work.