Question

ul JN InSoluble Precipitate Purpose his experiment will examine the reaction between BalNOsh and NH,SOJH (sulfamic acid) in a hot, combination of these two reactants will produce a precipitate which is insoluble in water. The primary the experiment is to determine the identity of the precipitate from mass relationships. pur Overview Specific quantities of Ba(NOsh and NH,SO,H will be allowed to react in boiling, distilled water. During the course of the reaction, certain covalent bonds in the sulfamic acid molecules will break during the reaction, which resulits in a polyatomic anion being formed. The anion will then complex with the Ba cations formed when the barium nitrate dissociated in the solution. The ionic substance produced when the cation and anion combine is insoluble in water and will form a white precipitate. The precipitate will then be separated from the solvent by use of gravity filtration in order to determine the mass of the solid Since the identification of the unknown precipitate depends on mass relationships, the final product of the reaction must by dried after being removed from the solvent. The precipitate will be placed into a drying oven in order to heat the sample and vaporize any water that remains. You will know when the precipitate is completely dry when the mass reaches a constant value within an acceptable error range (+0.002 g) The precipitate formed in the reaction will be one of three (3) possible compounds (see Table 1). The identity of the precipitate will be determined from the masses of the precipitate and limiting reactant. Table 1. Possible Precipitates Chemical Formula Ba(NH SOs) Molecular Weight (g/mol Chemical Name barium sulfamate barium sulfate barium amide 329.5 233.4 169.4 BasO Ba(NHz) The possible precipitates listed are the resulting products from the three unbalanced chemical rea -L BalNOub +-2-NHSOH +오-HO--, Ba(NHI..-2 Mso. +1-HNo, Before the experiment begins, you should balance these equations in order to see what the mole to mole ratios are for the reactants and to determine what the limiting reactant is for this reaction. Water is listed as reactant for all of these reactions, however, water is only a solvent for one of the reactions and does not react with the barium nitrate and sulfamic acid. 11Page

Answer 1

6 Sotution The batarced chenultaluato to te Ba (N03 4HNO3 Nuube muole dk pex te balaced chenlcal quation mele Ba (wo)a gives mole BaCutg Sos,a t mote Ba lvo gves mole Basoy mole a (No gives mole Ba (NH2) Thus alu Products i be 1 molo uvaleb

molecula o o5Ss 3294984 E 189 8T moloculas ma 005S5 x 833 382959 (Baso Mola nMam Nass u' moleculas ma 00955 163704(Baas