Periodicity_of_Alkali_Metals_and_Halogens_F2010-1 - Prelab...

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Prelab Exercise for Periodicity: Elements and Their Properties 1 – View the video clip that is available on under alkali metals. List the alkali metals in order of their increasing reactivity toward water. 2 – An experiment similar to the one for this lab was done with the hypothetical metals X, Y, and Z and the following results obtained. a) Z(s) + X +2 (aq) ---- > X(s) + Z +2 (aq) b) Y(s) + X +2 (aq) ---- > No Reaction c) X(s) + Y +2 (aq) ---- > Y(s) + X +2 (aq) Use the 3 results from the above reactions to arrange the metals X, Y, and Z from lowest to highest reactivity. In other words arrange the hypothetical metals X, Y and Z in order of their increasing ability to lose electrons. 3 – In the tests with the halogens, the upper layer (less dense) liquid is ______________. 4 – In this lab it is very important that the discarded solutions be placed in the correct bottle. Clearly describe into which container to discard the 1) alkali and alkaline earth metal solutions, 2) activity series-metals solutions 3) activity series-halogens solutions
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Periodicity: Elements and Their Properties Read this entire laboratory procedure before starting this lab Goals: 1. To give experience in observing elements in their pure state. 2. To allow the student to personally verify the periodic trends. 3. To give experience with descriptive inorganic chemistry. Equipment: Small beakers (100-250 mL) Watch glass Several small test tubes Test tube rack 24-well plate Materials: Small piece of calcium metal (2 - 3 mm) 6 M hydrochloric acid (HCl) Magnesium turnings 0.1 M potassium bromide solution (KBr) copper metal 0.1 M potassium iodide solution (KI) iron metal 0.1 M potassium chloride solution (KCl) zinc metal 0.1 M copper(II) nitrate solution (Cu(NO 3 ) 2 magnesium metal 0.1 M iron(II) nitrate solution (Fe(NO 3 ) 2 hexane 0.1 M zinc(II) nitrate solution (Zn(NO 3 ) 2 chlorine water 0.1 M Magnesium(II) nitrate solution (Mg(NO 3 ) 2 bromine water bromthymol blue indicator iodine water Background: The periodic chart is an extremely valuable way of listing (or arranging) the chemical elements. A chemist can always have a periodic chart available and once trends and arrangement are understood, this allows a large amount of information to be stored conveniently and retrieved easily. This lab explores three families within the periodic table. Procedure: Alkali Metals and Alkaline Earth Metal Reaction with Water and Acid.
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Periodicity_of_Alkali_Metals_and_Halogens_F2010-1 - Prelab...

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