Purpose/Objective The resolve of this illustration is to realize the interrupted trends in the solubility of the alkaline globe metals and parallel the remainders to that of guide Materials 1. Pencil 2. Lab referable attributable attributable attributable attributable attributable attributable attributable attributableebook 3. 5 slender criterion 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 Data and Remainders Mg(NO3)2Ca(NO3)2Sr(NO3)2Ba(NO3)2Pb(NO3)2 NaOHCloudyMilkyCloudyCloudyPure NaClNo reactionNo reactionNo reactionNo reactionPowder
NaBrNo reactionNo reactionNo reactionNo reactionCallous NaINo reactionNo reactionNo reactionCloudyCrystalline Yellow Na2SO4No reactionNo reactionWhite, yogurt-likeMilkyPure Na2CO3MilkyMilkyPowderWhite, cotton-likePowder Na2C2O4No reactionMilkyMilkyPowderPowder Sample Calculations Nundivided ? Discussion and Comments This illustration criterioned the hypothesis that the atoms in the interrupted consideration are moulded in a habit in which the atoms of a collection portion-out arelish chemical properties. The atoms we used were the undivideds from the alkaline globe metal collection.
These atoms aid to frame 2+ cations and are very reactive. We so paralleld these atoms to that of guide owing guide so frames a 2+ cation. We used the chemical ownership of solubility to referable attributable attributable attributable attributable attributable attributable attributable attributablee the interrupted trends of the alkaline globe metals. As a unconcealed government, reactivity increases as you provoke down a collection in the interrupted consideration. This instrument in commendations to solubility that the past you farther you provoke down the collection the past inseparable the atom is when collectively with hydroxides, chlorides, bromides, iodides, sulfates, carbonates, and oxalates.

My remainders were agreeing with this hypothesis in that the conformations went from no reaction to frameing a duck or from frameing a unencumbered duck to a burdensome undivided as the atoms provoked down the interrupted consideration. The ducks that were frameed fragmentarily transitional from a callous or pure conformation to a burdensome sconsideration duck that would fix on the depth of the criterion tube. In some instances guide reacted very alikely with the alkaline globe metal referable attributable attributable attributable attributable attributable attributable attributable attributablewithstanding very opposed in the other reactions such as with iodide.
This is attribuconsideration to guide’s comcomcollocation on the interrupted consideration as paralleld to those of the alkaline globe metals. The comcomcollocation on the interrupted consideration correlates to an atom’s ultimate radius, ionization essential-quality, and electron harmony. Whole of these properties seek an atom’s chemical properties such as solubility. A regular blunder occurred during my illustration when I referable attributable attributable attributable attributable attributable attributable attributable attributableed a reaction betwixt barium and iodide. There should own been no reaction. This blunder is probably the remainder of using a criterion tube that was referable attributable attributable attributable attributable attributable attributable attributable attributable attributable cleaned suitably antecedent to combining Ba(NO3)2 with NaI.
This illustration reinforced the concepts introduced in Chapter 8 of our textbook. Pre-Lab Questions 1. The names and symbols of the alkaline globe metals encountered in this illustration are: a. Magnesium – Mg b. Barium – Ba c. Strontium – Sr d. Calcium – Ca 2. a. The unconcealed electron shape of the alkaline globe metals is [Excellent mist]ns2. b. The electron shape control guide, Pb, is [Xe]6s25d104f146p2. c. Whole the frameulas of the oxides frameed by the alkaline globe metals and guide own the unconcealed frameula of RO. 3.
The unconcealed frameulas control the subjoined compounds with alkaline globe metals or guide: a. RSO4 b. RCl2 c. RCO3 d. RI2 e. RBr2 f. RC2O4 g. R(OH)2 h. R(NO3)2 i. RCrO4 4. The unconcealed manner that was used to criticize regulative solubilities in this illustration is referable attributable attributable attributable attributable attributableice. Post Lab Questions 1. The solubility of the alkaline globe metals with hydroxides increases as you provoke down the collection; separable with halides; with sulfates, carbonates and oxalates decreases as you provoke down the collection down the collection. 2. The solubilities betwixt alkaline globe metals and guide with NaOH are arelish ecause whole of the reactions were either callous or pure. The solubilities betwixt alkaline globe metals and guide with NaCl are opposed owing whole of the alkaline globe metals are separable referable attributable attributable attributable attributable attributable attributable attributable attributablewithstanding guide is referable attributable attributable attributable attributable attributable attributable attributable attributable. The solubilities betwixt alkaline globe metals and guide with NaBr are opposed owing whole of the alkaline globe metals are separable referable attributable attributable attributable attributable attributable attributable attributable attributablewithstanding guide is referable attributable attributable attributable attributable attributable attributable attributable attributable. The solubilities betwixt alkaline globe metals and guide with iodide are opposed owing whole of the alkaline globe metals are separable referable attributable attributable attributable attributable attributable attributable attributable attributablewithstanding guide is referable attributable attributable attributable attributable attributable attributable attributable attributable attributable separable and frameed a crystalline yellow duck.
The solubilities of Mg and Ca with SO4 are opposed owing they are separable referable attributable attributable attributable attributable attributable attributable attributable attributablewithstanding guide is referable attributable attributable attributable attributable attributable attributable attributable attributable attributable and solubilities of Sr and Ba are arelish to guide. The solubilities betwixt alkaline globe metals and guide with CO3 are arelish since whole of compounds frame some manner of a pure duck. The solubility of Mg with C2O4 is opposed from guide owing it is separable referable attributable attributable attributable attributable attributable attributable attributable attributablewithstanding guide is referable attributable attributable attributable attributable attributable attributable attributable attributable attributable and solubilities of intermission of alkaline globe metals are arelish owing they whole frame some manner of pure duck. . The solubilities of the alkaline globe metals and that of guide may dispute markedly attribuconsideration to their relative electron shapes. The alkaline globe metals relish to present up brace electrons from their outside shell and frame cations owing by doing so their electron shape becomes isoelectronic with the closest excellent mist. Guide looses its to electrons from the 6p suborbital. Resources Chang, R. (2010). Chemistry: 10th Edition. New York, NY: McGraw Hill.

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