Using the solubility guidelines (Figure 3.10), predict whether each of the following is insoluble or soluble in water.
(a) (NH₄)₂CO₃
(b) ZnSO₄
(c) NiS
(d) BaSO₄

Data given in Figure 3.10

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Soluble compounds Almost all salts of Almost all salts of Na+, K+, NH₂+ Cl, Br, I Salts of nitrate, NO3 chlorate, ClO3 perchlorate, ClO4 acetate, CH3CO₂ Silver compounds Exceptions (not soluble) Halides of Ag+, Hg₂+, Pb²+ AgNO, AgCl AgOH (a) Nitrates are generally soluble, as are chlorides (exceptions include AgCl). Hydroxides are generally not soluble. Salts containing F Exceptions (not soluble) Fluorides of Mg2+, Ca²+, Sr²+, Ba²+, Pb²+ Sulfides Salts of sulfate, SO4²- Exceptions (not soluble) Sulfates of Ca²+, Sr²+, Ba²+, Pb²+, Ag+ (NH₂)₂S Cds Sb₂S3 PbS (b) Sulfides are generally not soluble (exceptions include salts with NH₂+ and Na+). Insoluble compounds Most salts of carbonate, CO3²- phosphate, PO₂³- oxalate, C₂0₂²- chromate, CrO²- sulfide, S²- Exceptions (soluble) Salts of NH₂+ and the alkali metal cations, and Bas Hydroxides Most metal hydroxides and oxides Exceptions (soluble) Alkali metal hydroxides and Ba(OH)2 and Sr(OH)2 Photos: Cengage Leaming/Charles D. Winters NaOH Ca(OH)₂ Fe(OH), Ni(OH)₂ (c) Hydroxides are generally not soluble, except when the cation is a Group 1A metal (or Sr²+ or Ba²+).