Solubilities Within a Family Lab Report Essay

973 Words4 Pages
Purpose/Objective The purpose of this experiment is to identify the periodic trends in the solubility of the alkaline earth metals and compare the results to that of lead Materials 1. Pencil 2. Lab notebook 3. 5 small test 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 Results Mg(NO3)2 Ca(NO3)2 Sr(NO3)2 Ba(NO3)2 Pb(NO3)2 NaOH Cloudy Milky Cloudy Cloudy Milky NaCl No reaction No reaction No reaction No reaction Powder NaBr No reaction No reaction No reaction No reaction Cloudy NaI No reaction No reaction No reaction…show more content…
In some instances lead reacted very similarly with the alkaline earth metal but very different in the other reactions such as with iodide. This is due to lead’s position on the periodic table as compared to those of the alkaline earth metals. The position on the periodic table correlates to an element’s atomic radius, ionization energy, and electron affinity. All of these properties affect an element’s chemical properties such as solubility. A systematic error occurred during my experiment when I observed a reaction between barium and iodide. There should have been no reaction. This error is probably the result of using a test tube that was not cleaned properly prior to combining Ba(NO3)2 with NaI. This experiment reinforced the concepts introduced in Chapter 8 of our textbook. Pre-Lab Questions 1. The names and symbols of the alkaline earth metals encountered in this experiment are: a. Magnesium – Mg b. Barium – Ba c. Strontium – Sr d. Calcium – Ca 2. a. The general electron configuration of the alkaline earth metals is [Noble gas]ns2. b. The electron configuration for lead, Pb, is [Xe]6s25d104f146p2. 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

More about Solubilities Within a Family Lab Report Essay

Open Document