1. Review example 4.01. Use the solubility rules to determine which of the following ionic compounds are soluble in wafer: (NH4)2CO3, K2S, Bal2, and CaCO3. Some of these compounds have two rules each that apply to them. Describe ALL of the applicable rules and applicable exceptions for each ion in the compound. (2 pts) (NH4)2CO3 has two applicable rules and an applicable exception. K?S has two applicable rules and an applicable exception. Bal2 has one applicable rule. Also, describe if an exception is applicable. CaCO3 has one applicable rule. Also, describe if an exception is applicable.
Ex 4.01 Determine if Compounds are Soluble Most chlorides are soluble, but see the exceptions to rule 3. a. PbCl? b. LiBr See rules 1 (alkali metals in column 1A) and 3 (halogens in column 7A). Are any Li salts insoluble? Is Lit¹ an exception to the rule for Br ¹2 c. Hg(NO3)2 See rule 2. Are any NO3 salts insoluble?
Rule la lb 2 3 4 5,6,7 100 8 Solubility Rules Rule Always Soluble Always Soluble Always Soluble Usually Soluble Usually Soluble Usually Insoluble Usually Insoluble Ion Group I-A (Li, Na¹, K¹¹) Ammonium (NH?¹) Nitrate, Acetate, Permanganate (NO?¹, CH?COO, and MnO4) Group VII-A except F (C¹, Br, and I¹) Sulfate (SO) Carbonate, Phosphate, Sulfide (CO?, PO, and S2) Oxide (O) and Hydroxide (OH¹) Exceptions None None None Cu 3 Ag, Hg, Hg, and Pb (Hg, Pb slightly sol. w/ CI¹, Br¹) Hg, Pb, Sr, and Ba (Ag, Ca2 are slightly soluble) Group I-A and NH (MgCO, and Group II-A sulfides are slightly soluble) Group I-A, NH4, Ba, and Sr (Ca is slightly soluble)