Lec03E2F08key.pdf - Chem.125-126 Sept.17-23 E1:Discussion...

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Chem.125-126: Sept.17-23 Agenda One hour discussion of E1 (Questions, p.48) Two hours of E2; E2 = two session 5 hour lab Preparation Pre-lab Report (p.63) for E2 completed Discussion Presentation for E1 completed Pre-lab reading and studies for E2 completed E1:Discussion Preparation Refer to the discussion grading rubricks, pp. 46-47. Refer to the discussion information, page 233 and posted on CTools. Send presentation to GSI and obtain feedback E2: Electrons and Solution Color Session 1: Two Hour Lab Agenda* Complete Part 1 (Solution preparation) Complete Part 2 Prepare Part 4 (Solution dilutions) or start Part 3 as indicated by GSI * See Student Information Sheet on Ctools. Session 2: Three Hour Lab Agenda Complete Parts 3, 4, and 5 E2: Electrons and Solution Color Is salt solution color predictable based on: the position of the metal ion’s element in the periodic table? the metal ion’s electron configuration (Fig. 3, p. 223) ? the metal ion’s ionic radius (Ionic Sizes, p. 255) ? Its absorption and transmission of visible light? Goals: See discussion questions (p.73) Part 1. Preparation and Color of Solutions 1 H+ Hydrogen IIIA IVA VA 3 Li+ Lithium 4 Be Beryllium 1 1 Na+ Sodium 1 2 Mg 2 + Magnesium IIIB IVB VB VIB VIIB VIIIB ! VIIIB IB IIB 1 3 Al3+ Aluminum 1 9 K+ Potassium 2 0 Ca 2 + Calcium 2 1 Sc Scandium 2 2 Ti Titanium 2 3 V Vanadium 2 4 Cr 3+ Chromium 2 5 Mn Manganes e 2 6 Fe 3+ Iron 2 7 Co 2+ Cobalt 2 8 Ni 2 + Nickel 2 9 Cu 2+ Copper 3 0 Zn 2 + Zinc 3 1 Ga Galium 3 2 Ge Germanium 3 7 Rb Rubidium 3 8 Sr 2 + Strontium 3 9 Y Yitrium 4 0 Zr Zircon- ium 4 1 Nb Niobium 4 2 Mo Molyb- denum 4 3 Tc T echnetium 4 4 Ru Ruthenium 4 5 Rh Rhodium 4 6 Pd Palladium 4 7 Ag+ Silver 4 8 Cd 2 + Cadmium 4 9 In Iridium 5 0 Sn 2+ Tin 5 1 Sb Antimony 5 5 Cs Cesium 5 6 Ba 2 + Barium 5 7 La * Lanthanum 7 2 Hf Hafnium 7 3 Ta Tantalum 7 4 W Tungsten 7 5 Re Rhenium 7 6 Os Osmium 7 7 Ir Iridium 7 8 Pt Platinum 7 9 Au Gold 8 0 Hg 2 + Mercury 8 1 Tl Thallium 8 2 Pb 2 + Lead 8 3 Bi Bismuth Teams prepare solutions with different metal ions Record the color of solutions.
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