Write the correct formulas for the following compounds that contain polyatomic ions. Compounds | Formulas | Sodium hydroxide | NaOH | Potassium nitrate | KN03 | Magnesium sulfate | Mg2SO4 | Aluminum phosphate | AlPO4 | Aluminum nitrate | Al(NO3)3 | Ammonium nitrate | NH4NO3 | 25. Name each of the following binary ionic compounds. Formulas | Name | NaBr | Sodium Bromide | MgS | Magnesium Sulfide | CaO | Calcium Oxide | MgCl2 | Magnesium Chloride | AlF3 | Aluminum fluoride
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Experiment 9 Empirical Formula of Zinc Iodide Objectives Upon completion of this experiment‚ students should have learned: 1. The law of conservation of mass. 2. How to calculate an empirical formula. 3. The concept of limiting reagents. Introduction Synthesis and the determination of empirical formulas are two extremely important parts of chemistry. In this experiment‚ you will synthesize zinc iodide and determine its empirical formula. The molecular formula gives the actual
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Experiment # 1 Date: 18/12/13 Title: Chemical Properties of Alkanes. Aim: To test the reactivity of alkanes using cyclohexane as an example. Apparatus/Materials: Cyclohexane‚ liquid alkane‚ aqueous bromine‚ test tubes‚ light source‚ watch glass‚ splint‚ 0.1 MKMnO4‚ concentrated H2SO4‚ dilute H2SO4. Method: Combustion: 1. A watch glass was placed on a benched protection sheet in a fume cupboard and the extractor in the fume on. 2. 4 drops of cyclohexane was placed on the watch glass using
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Assign an oxidation number to each atom in: a. Al2O3 b. HAsO42c. NaMnO4 4. Identify the reducing agent and the oxidizing agent in the following reaction: MnO4- + 5 Fe2+ + 8 H+ → Mn2+ + 5 Fe3+ + 4 H2O 1. Balance the equation: FeS (s) + HCl (aq) → FeCl2 (aq) + H2S (g) Given 13.2 g FeS and 10.2 g HCl‚ determine: (a) how much H2S is formed‚ (b) how much excess reactant is left. 1. Assign the oxidation number to each atom in: a. Ga2O3 b. H3PO4 c. Ca(MnO4)2 2. 100.00 g of sodium chloride
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D. REACTIONS OF ALDEHYDES AND KETONES WITH SODIUM HYDROXIDE (By: Mary Deo Luigi J. Mabunay 1N-3) Objective: To determine the reactions of Aldehydes and Ketones when combined with Sodium Hydroxide. Process: * Obtain 5 clean and dry test tubes * Put 2mL of 40% NaOH solution to test tubes 1‚ 2 and 3 and on test tubes 4 and 5‚ put 10% NaOH solution * Add 10 drops of the following solution: * Tube 1: formaldehyde * Tube 2: benzaldehyde * Tube 3: acetaldehyde
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to acidified ascorbic acid solution. Brown iodine can be easily reduced by acidified ascorbic acid to form colourless iodide ion: ← Equation I The excess iodine is then back titrated by standard sodium thiosulphate solution‚ by using a burette and starch solution (used as end point indicator) Similarly‚ iodine can also be decolourized by thiosulphate ion: 2S2O32- + I2 → S4O62- + 2I-
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synthesis reaction is a reaction in which two or more substances combine to form a new compound * Synthesis reactions have the following general form: A + B AB * Example: in the following synthesis reaction‚ the metal sodium reacts with the chlorine gas to form sodium chloride‚ or table salt. * 2Na+Cl2 2NaCl * A decomposition reaction is a reaction in single compound beaks down to form two or more simpler substances. * Decomposition reactions have the flowing form: AB
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FORM 4G ELECTROLYSIS WORKSHEET TERM 3 2010-2011 1.Figure 1 below is a diagram of the apparatus used in the electrolysis of fused sodium bromide. Figure 1 a)Write the formulae for the ions present in the fused sodium bromide. b)Write an ionic equation to represent the reaction taking place at the positive and negative electrodes. c)When the heat source was removed‚ the crucible cooled and the lamp went out. Explain why the lamp went out when the crucible cooled. d)At the end of the experiment
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Detergent-any proprietary detergent for washing/wiping surfaces and items; • Phenolic + detergent-e.g. Stericol-for bacterial infections; • Hypochlorite+detergent- for incidents of viral infection; • Cream clenser- any proprietary cream/liquid bath cleanser(not scourers); • De-scaling agent- for cleaning shower heads; • Disinfectant-e.g. presept- sodium dichloroicyanurate granules dissolved in water to 1000 ppm available chlorine; • Carpet
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Cleaning a territory or thing defiled by anthracis includes various and variable issues that are particular to individual areas. No single innovation‚ procedure‚ or methodology will be compelling for each situation. Respondents must build up a cleaning plan that considers the accompanying: The way of the defilement: including the sort of anthrax included‚ how it entered the office and the physical attributes that influence the spread of contamination. The degree of defilement: including the measure
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