The Alkaline Earths and the Halogens-Two Families in the Periodic Table

1 January 2017

Rinse the tubes and add 1 mL chlorine water and 1mL HEX to each test tube. 8. Then add 1 mL 0. 1 M solutions of the sodium halide salts, one per test tube. 9. Stopper each test tube and shake, noting the color of the HEX layer after shaking. 10. Decide whether Cl2 is a better oxidizing agent than Br2 or I2. 11. Again, rinse the tubes and add 1 mL iodide water and 1mL HEX to each. 12. Test each tube with 1 mL of a sodium halide salt solution and determine whether I2 is able to oxidize Cl? or Br ? ions. 13. Record observations in the Table. III. Identification of an Alkaline Earth Halide 1.

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Develop a method for determining which cation is present in a solution containing one Group 2 cation and no other cations. 2. Determine which halide ion is present in a solution containing only one such anion and no others. Purpose The purpose of this lab is to observe the solubility properties of various ionic compounds containing alkaline earth metal cations, to observe the relative abilities of the halogens to be reduced to halides, or act as oxidizing agents and to use the above observations to identify an unknown salt consisting of an alkaline earth metal cation and a halide anion.

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