Qualitative Anion Tests PURPOSE: The purpose of this experiment is to identify some commonly occurring anions & to study some of the reactions used for their identification. PROCEDURE: You must first determine to which of the three groups the various anions belong. Since no two people observe the same event in exactly the same way it is important to also conduct specific confirmation tests on the known samples of each anion. This information will help identify the anion present in
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Name: Lisa Brewer iLab‚ Week # 2 CATIONS AND ANION LAB Introduction The purpose of this week’s lab is to learn to demonstrate a double-replacement reaction of ionic compounds. To accomplish this‚ two ionic compounds will be mixed together and the product will precipitate out of solution. In this procedure‚ the product must be precipitated out of the solution and then weighed. For this lab‚ lead (II) nitrate (Pb(NO3)2) and potassium chromate (K2CrO4) will be reacted together to demonstrate
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Introduction The goals of this experiment were to determine periodic trends in solubility of group 2 metals. The other goal was to use our knowledge of solubility’s to identify cations present in a single unknown Xe and double unknown XXe. I have hypothesized that the solubility of group 2 elements will decrease as we progress down the periodic table .I think that this will happen because of effective nuclear charge (Zeff) which
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In cation exchange chromatography‚ a negatively charged resin is used. A commonly used resin is Dowex‚ which contains linked sulfonate groups that contribute to its negative charge. As a solution is passed through the resin‚ molecules that exhibit greater positive
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1– Qualitative Analysis of Cations Rachel Sorrells Gretchen Diede TA: Kunal Punjabi February 16‚ 2017 RESULTS & DISCUSSION The purpose of this experiment was to utilize two different methods of qualitative analysis to determine the identity of two unknown cations in an unknown solution. The experiment required knowledge of solubility rules and demonstration of such in the laboratory setting for the first method of qualitative analysis. The second method of qualitative analysis was the performance
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Data Table: Qualitative Cation Tests Name Test Tube 1: HClNH3 Test Tube 2: NaOHExcess Aluminum 3+ No precipitate Slightly milky Dissolves Ammonium + No Precipitate No precipitate Calcium 2+ No Precipitate Milky white precipitate Precipitate does not dissolve Copper 2+ No precipitate Became much darker blue and milky Iron 3+ Brighter yellow Orange precipitate that then dissolves Lead 2+ Milky white precipitate Precipitate gets more milky Silver + Milky white precipitate Precipitate gets
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Chemical Proced-ure or equipm-ent Risks Precautions to be taken Safety regulations Concentrated sulphuric acid Test tube and pipette Corrosive skin and toxic if swollen Wear goggles and gloves when In contact with this Keep locked up. Keep container dry. Do not ingest. Do not breathe gas/fumes/ vapour/spray. Never add water to this product. In case of insufficient ventilation‚ wear suitable respiratory equipment. If ingested‚ seek medical advice immediately and show The container or the
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QUALITATIVE TESTS FOR SOME CATIONS II CHEMISTRY 11.1 OCTOBER 5 2013 QUALITATIVE TESTS FOR SOME CATIONS II I. Introduction Qualitative analysis schemes are often based on selective precipitation of different cations. By carefully selecting reagents and conditions for reactions‚ groups of ions can be separated on the basis of their reactivity and the solubility of their salts. This enables the experimenter to use simple techniques with standard laboratory equipment‚ as well as to learn
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Radical Cations•+: Generation‚ Reactivity‚ Stability R A R A MacMillan Group Meeting 4-27-11 by Anthony Casarez Three Main Modes to Generate Radical Cations Chemical oxidation D A D A Photoinduced electron transfer (PET) h! 1) D A D A* D A 2) D A h! D* A D A Electrochemical oxidation (anodic oxidation) D Anode D Chemical Oxidation Stoichiometric oxidant: SET O N Bn H N Me O N Me t-Bu
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Purpose: The purpose of this experiment is to identify some commonly occurring anions & to study some of the reactions used for their identification. Materials: 1 Household Bleach‚ 2 mL 1 Distilled water 1 Toothpicks 2 Beaker‚ 50 mL‚ plastic 1 Cylinder-25-mL 1 Pencil‚ marking 1 Test Tube (5)‚ 13 x 100 mm in Bubble Bag 1 Well-Plate-24 1 Ammonium Molybdate‚ 0.2 M - 2 mL in Pipet 1 Aqueous Ammonia‚ 6 M‚ NH4OH - 4 mL in Pipet 1 Barium Chloride‚ 0.3 M - 2 mL in Pipet 1 Hydrochloric Acid‚ 6 M - 8 mL
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