Please choose all that apply. Soluble Compounds. Which of the following combinations could yield a black precipitate? insoluble because there are no water soluble s−2 compounds. When using the table, refer to the soluble compounds first. 1) Na2S (aq) + KCl (aq) 2) Li2S (aq) + Pb(NO3)_2 (aq) 3) Pb(ClO3)_2 (aq) + … So, Na2S is soluble, and CuS is insoluble. MgS is easily decomposed (hydrolysed) by water to form insoluble magnesium hydroxide and hydrogen sulphide gas. Exceptions include Na 2O, K 2O, SrO, and BaO, which are soluble, and CaO, which is slightly soluble. Fam IA cmpds, Ca(OH)2, BaSO4, NH4Br, Li2CO3, CuCl, (NH4)2S, PbI2, SrSO4 soluble - soluble (more than 1g per 100g of water) low - low solubility (0.01g to 1g per 100g of water) insoluble - insoluble (less than 0.01g per 100g of water) not exist - … Thanks a LOT in advance. Magnesium chloride is also soluble in water like chlorides of most metals. Slightly soluble in alcohol. Na2S: most sulfides are insol, except IA's LiO: IA cmpds= sol HC2H3O2 (acetic acid): acetate is soluble, acid in H2O, so aqueous NH4Cl: ammonium cmps= sol Which of the following are insoluble? Sulfides are insoluble unless combined with Li, Na, K, Rb, Cs, and NH4. Oxides (O2-) are usually insoluble. For example, sodium carbonate is soluble because all sodium compounds are soluble, even though most carbonates are insoluble. Safety: 1/2-26-36/37/39-45-61 Alfa Aesar 65122, 88697: Soluble in water and alcohol Alfa Aesar 88697: Soluble in water. Compounds that don't dissolve around room temperature may become more soluble in warm water. insoluble because most na+1 compounds are insoluble in water. soluble because all s−2 compounds are soluble in water. When the compound, na2s, is mixed with water, the na2s is: soluble because all na+1 compounds are soluble in water. MgS (s) + 2H2O (l) = Mg (OH)2 (s) + H2S (g) Sodium salts are generally soluble in water. Na2S: most sulfides are insol, except IA's LiO: IA cmpds= sol HC2H3O2 (acetic acid): acetate is soluble, acid in H2O, so aqueous NH4Cl: ammonium cmps= sol Insoluble sulfide compounds are generally black in color. When the compound, Na2S, is mixed with water, the Na2S is: soluble because all Na+1 compounds are soluble in … The catalyst activities for Na2S oxidation in aqueous soln were examined for various materials such as activated C, C black, ferric salts, hydroquinone, 1,4-naphthoquinone-2-sulfonic acid sodium salt, 1,4-naphthoquinone and their mixed systems. When the compound, Na2S, is mixed with water, the Na2S is: soluble because all Na+1 compounds are soluble in waterinsoluble because most Na+1 compounds are insoluble in watersoluble because all S−2 compounds are soluble in waterinsoluble because there are no water soluble S−2 compounds. Exceptions include NaOH, KOH, Sr(OH) 2, and Ba(OH) 2, which are soluble, and Ca(OH) 2, which is slightly soluble. 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