Water is a polar molecule that exhibits hydrogen bonding, so the best solute is another polar compound. To predict whether a compound will be soluble in a given solvent, remember the saying, “Like dissolves like.” Highly polar ionic compounds such as salt readily dissolve in polar water, but do not readily dissolve in non-polar solutions such as benzene or chloroform. Most of the s block metals' compounds are soluble in water. Classify each compound as soluble or insoluble. The table below provides information on the variation of solubility of different substances (mostly inorganic compounds) in water with temperature, at one atmosphere pressure.Units of solubility are given in grams per 100 millilitres of water (g/100 ml), unless shown otherwise. Lithium forms some insoluble compounds. Aqueous (water) solubility is a function of polarity. Zn(NO 3) 2; PbBr 2; Sr 3 (PO 4) 2; Solution. Recall that the main idea in dissolution is like dissolves like, which means compounds with the same polarity and intermolecular force can dissolve each other. Remember some BASIC rules of solubility: (SIW=soluble in water) (i) ALL sodium, potassium, ammonium, ethanoate and nitrate-containing salts are SIW (ii) ALL chloride-containing salts are SIW except: mercury(I) chloride, silver chloride and lead(II) chloride. Third, compounds differ to the extent they are soluble and there are solubility constants for every compound. That is, a compound may be slightly soluble in water while part of it remains a precipitate. This question always devolves to a comparison between the ionic compound staying intact (and the water, too) with a state in which all of the ions separated from one another (and water molecules separated to make room for them). This is an amorphous arsenic compound. All bromides are soluble in water, except those combined with Pb 2 +, so PbBr 2 is insoluble. Hydrocarbons are non polar, or almost so, and therefore are not soluble. The substances are listed in alphabetical order. Lithium carbonate, lithium fluoride and lithium phosphate are insoluble in water. The water's partial charges attract different parts of the compound, making them soluble in water. single displacement. We’re being asked to determine the compound that is most soluble in water. Alkali earth metals form more insoluble compounds than alkali metals. Ions form in water when some compounds dissolve in water. All phosphates are … Reaction mechanism: As 2 S 3 + 6 H 2 O -> 2 H 3 AsO 3 + 3 H 2 S. In natural water arsenic participates in oxidation and reduction reactions, coagulation and adsorption. Contents Solubility of NaHCO 3 is low when compared to KHCO 3. An example of an arsenic compounds that reacts strongly with water is orpiment. All of the following compounds are soluble in water except A. CaCl2 B. NH4Cl C. FeCl3 D. NaCl E. PbCl2. Alkali metals. What type of reaction is the generic equation A + BC -> AC + B. E. all of the above (energy, heat, light, electrical current) what must be supplied for … All nitrates are soluble in water so Zn(NO 3) 2 is soluble. Ions in Water. Second, compounds may be soluble in solvents other than water.