Posted by Jacob on Monday, February 22, 2010 at 5:17pm.
NaI is ok.
K2SO4 will be K^+ and SO4^-2
NaCn is Na^+ + CN^-
Ba(OH)2 is Ba^+ and OH^-
(NH4)2SO4 is NH4^+ and SO4^-2
I think the purpose of this question is to help you concentrate on knowing the polyatomic ions such s sulfate, cyanide ion, hydroxide etc.
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