Solubilities Within a Family Lab Report

Purpose/Objective The place of this experimentation is to identify the occasional trends in the solvability of the saltlike hide surfaces and equalise the results to that of make it Materials 1. Pencil 2. Lab notebook computer 3. 5 sm wholly sieve tubes 4. Droppers Chemicals 1. 0. 2 M Mg(NO3)2 2. 0. 2 M Ca(NO3)2 3. 0. 2 M Sr(NO3)2 4. 0. 2 M Ba(NO3)2 5. 0. 2 M Pb(NO3)2 6. 1 M NaOH 7. 0. 2 M NaBr 8. 0. 2 M NaI 9. 0. 2 M Na2SO4 10. 0. 1 M Na2CO3 11. 0. 2 M Na2C2O4 12. 1 M NaCl entropy and Results Mg(NO3)2Ca(NO3)2Sr(NO3)2Ba(NO3)2Pb(NO3)2 NaOHCloudyMilkyCloudyCloudyMilky NaClNo replyNo reactionNo reactionNo reactionPowderNaBrNo reactionNo reactionNo reactionNo reactionCloudy NaINo reactionNo reactionNo reactionCloudyBright Yellow Na2SO4No reactionNo reactionWhite, yogurt-likeMilkyMilky Na2CO3MilkyMilkyPowderWhite, cotton-likePowder Na2C2O4No reactionMilkyMilkyPowderPowder Sample Calculations None ? word and Comments This experiment tryouted the theory that the elements in the periodic table argon arranged in a manner in which the elements of a group sh argon homogeneous chemical properties. The elements we employ were the ones from the alcalescent nation metal group.These elements tend to form 2+ cations and argon very(prenominal) reactive. We also compared these elements to that of occupyership because leash also forms a 2+ cation. We used the chemical property of solvability to observe the periodic trends of the saltlike dry land metals. As a widely distributed rule, responsiveness increases as you bm strike downhearted a group in the periodic table. This substance in regards to solubility that the more than you farther you move down the group the more in dissolvable the element is when combined with hydroxides, chlorides, bromides, iodides, sulfates, carbonates, and oxalates.My results were concordant with this theory in that the potpourris went from no reaction to forming a effectuate or from forming a light precipitate to a lif e-threatening one as the elements moved down the periodic table. The precipitates that were form gradually changed from a marshy or milky mixture to a heavy solid precipitate that would settle on the bottom of the test tube. In virtually instances lead reacted very mistakablely with the alkaline globe metal but very different in the other reactions much(prenominal) as with iodide.This is delinquent to leads position on the periodic table as compared to those of the alkaline populace metals. The position on the periodic table correlates to an elements nuclear radius, ionization energy, and electron affinity. All of these properties refer an elements chemical properties such as solubility. A systematic actus reus occurred during my experiment when I observed a reaction among barium and iodide. in that location should have been no reaction. This error is likely the result of using a test tube that was not cleaned properly preliminary to combining Ba(NO3)2 with NaI.This ex periment reinforced the concepts introduced in Chapter 8 of our textbook. Pre-Lab Questions 1. The names and symbols of the alkaline human race metals encountered in this experiment are a. atomic number 12 Mg b. Barium Ba c. atomic number 38 Sr d. Calcium Ca 2. a. The customary electron configuration of the alkaline priming coat metals is Noble gasns2. b. The electron configuration for lead, Pb, is Xe6s25d104f146p2. c. All the formulas of the oxides formed by the alkaline earth metals and lead have the general formula of RO. 3.The general formulas for the following compounds with alkaline earth metals or lead a. RSO4 b. RCl2 c. RCO3 d. RI2 e. RBr2 f. RC2O4 g. R(OH)2 h. R(NO3)2 i. RCrO4 4. The general method that was used to examine qualitative solubilities in this experiment is observation. Post Lab Questions 1. The solubility of the alkaline earth metals with hydroxides increases as you move down the group oil- fat-soluble with halides with sulfates, carbonates and oxalate s decreases as you move down the group down the group. 2. The solubilities mingled with alkaline earth metals and lead with NaOH are similar ecause all of the reactions were either cloudy or milky. The solubilities betwixt alkaline earth metals and lead with NaCl are different because all of the alkaline earth metals are soluble but lead is not. The solubilities between alkaline earth metals and lead with NaBr are different because all of the alkaline earth metals are soluble but lead is not. The solubilities between alkaline earth metals and lead with iodide are different because all of the alkaline earth metals are soluble but lead is not soluble and formed a bright yellow precipitate.The solubilities of Mg and Ca with SO4 are different because they are soluble but lead is not and solubilities of Sr and Ba are similar to lead. The solubilities between alkaline earth metals and lead with CO3 are similar since all of compounds form some pick out of a white precipitate. The solubi lity of Mg with C2O4 is different from lead because it is soluble but lead is not and solubilities of breathe of alkaline earth metals are similar because they all form some sort of white precipitate. . The solubilities of the alkaline earth metals and that of lead may differ markedly collectable to their respective electron configurations. The alkaline earth metals like to give up two electrons from their outer shell and form cations because by doing so their electron configuration becomes isoelectronic with the walking(prenominal) noble gas. Lead looses its to electrons from the 6p suborbital. Resources Chang, R. (2010). Chemistry tenth Edition. New York, NY McGraw Hill.