Question

which of the following ion/ions are always soluble -- no exceptions? oh⁻ cl⁻,br⁻,i⁻ c₂h₃o₂⁻ group 1,nh₄⁺,no₃⁻,&clo₃⁻

Explanation:

According to solubility rules, compounds containing Group 1 cations (\(Li^+\), \(Na^+\), \(K^+\), etc.), \(NH_4^+\), \(NO_3^-\), and \(ClO_3^-\) are always soluble in water with no exceptions. For \(OH^-\), most hydroxides are insoluble (e.g., \(Fe(OH)_3\) is insoluble). For \(Cl^-\), \(Br^-\), \(I^-\), their salts with \(Ag^+\), \(Pb^{2 + }\), \(Hg_2^{2+}\) are insoluble (e.g., \(AgCl\) is insoluble). For \(C_2H_3O_2^-\) (acetate ion), while most acetates are soluble, there are some less - common exceptions in very specific chemical systems (though less common than the others).

Answer:

Group 1, \(NH_4^+\), \(NO_3^-\), & \(ClO_3^-\)