stirrer and follower (optional) Stopclock/timer‚ 5 0.2 g soluble starch 1M sulfuric acid (Irritant)‚ 50 cm3 Potassium iodide (KI)‚ 6.0 g. (Low hazard) Sodium thiosulfate-5-water (Na2S2O3.5H2O)‚ 7.5 g (Low hazard) 20 volume hydrogen peroxide solution (H2O2(aq))‚ 100 cm3 (Irritant) Deionised/distilled water‚ 1 dm3. • 189 Technical notes 20 volume hydrogen peroxide is Irritant. Refer to CLEAPSS® Hazcard 50. 1M sulfuric acid is Corrosive. Refer to CLEAPSS® Hazcard 98A 1 Solution X and the starch
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AP Chemistry: Chapter 17 Student Notes Objectives 17.1a: Review Redox Assign Oxidation Numbers to the following: a. HNO3 b. PbSO4 c. (NH4)2Ce(SO4)3 Balance the following in acidic medium Al (s) + MnO4- (aq) Al3+ (aq) + Mn2+ (aq) Balance the following in a basic medium Mg (s) + OCl- (aq) Mg(OH)2 (s) + Cl- (aq) Balance the following Redox Reaction: The big nasty problem K4Fe(CN)6 + KMnO4 + H2SO4 KHSO4 + Fe2(SO4)3 + MnSO4 + HNO3 + CO2 +H2O 17.1: Galvanic Cells
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figure out if concentration plays a part in the reaction rate. To begin this trial‚ we gathered 3 cuvettes in which we added horseradish peroxidase in the following amounts; .5 mL‚ 1.0 mL and 2.0 mL. In each of these cuvettes‚ we added 2.0 mL of H2O2‚ 1.0 mL of Guaiacol and enough pH 5 Buffer to fill each cuvette to 8.0 mL with all of the materials combined. Immediately after adding the materials in each cuvette‚ we placed it in the spectrophotometer to get an absorbance reading @ 500 nm in 20
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beakers One stirring rod One medicine dropper Alcohol lamp or Busen burner Water bath One looped platinum or nichrome wire Label REAGENTS 0.5 M CaCl2 0.5 M BaCl2 M NaOH 0.1 M AgNO3 0.5 M KCl 0.5 M KBr 0.5 M KI 2 M NH4OH M KCN % H2O2 2 M H2SO4 MnO2 Saturated FeSO4 0.1 M NaNO3 CH3COOH 0.5 M Na2SO3 0.1 M KSCN 2 N KOH 0.5 M K4[Fe(CN)6] 0.5 M FeSO4 0.5 M FeCl3 0.5 M Al2(SO4)3 2 N HCl 0.5 M LiCl 0.5 M NaCl 0.5 M KCl 0.5 M K2Cr2O7 96% H2SO4 III. EXPERIMENTAL
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Objectives Man is one of the species who inhabit the earth.he is the only one who has interfered with various natural processes for use of both biological & physical resources to meet his multiple demands‚man has polluted all the three realms of the earth-lithosphere‚hydrosphere & atmosphere.it is essential for us to know about environment & its pollution. In this presentation we will be able to know about- •Environment •Biosphere •Ecosystem model •Atmosphere •Atmospheric pollution •Primary & secondary
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liberate the Co (II) in the solution. “Activated” charcoal and ammonia are then added to the solution. The Co (II) is then oxidized to Co (III) using hydrogen peroxide (H2O2). This yields an orange crystalline solid of 8.9379 grams‚ later found to be [Co(NH3)6]Cl3. [Co(H2O)6]+2 + 6 NH3 [Co(NH3)6]+2 + 6 H2O 2 [Co(NH3)6]+2 + 2 H+ + H2O2 2 [Co(NH3)6]+3 + 2 H2O -3.0 Analysis for Percent Halide In The Synthesized Cobalt-Ammonia-Halide Compound (pgs 23-4) HNO3 is used to acidify the soluble chloride-containing
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10/24/13 THE STRUCTURE AND FUNCTIONS OF ENZYMES Enzymes are extremely important to the human body and its ability to function. An enzyme itself is a protein made by the body’s cells to act as catalyst‚ speeding up chemical reactions in the cell. It does this by taking the reactants‚ or the elements or compounds that enter into the chemical reaction‚ in this situation referred to as substrates‚ and breaking apart their bonds so that new ones can form. The three types of enzymes are digestive
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Introduction Enzymes are proteins produced by living organisms to speed up the rate in which chemical reactions occur. This process can happen fast‚ slowly‚ or stop the chemical reaction all together depending on the temperature‚ pH and concentration. Catalase is one of the most common enzymes. It is found in living organisms and is used to break down hydrogen peroxide. This must happen because hydrogen peroxide is considered toxic to cells in the body. However‚ when catalase is used it breaks
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Bromination of trans- Stilbene to form 1‚2- Dibromo- 1‚2-diphenylethane Abstract 1‚2-dibromo-1‚2-diphenylethane was produced by the bromination of trans-stilbene through the addition of hydrobromic acid (HBr) and hydrogen peroxide (H2O2). This experiment was a greener bromination of stilbene because bromine was generated in situ and ethanol was used as the solvent. The melting point (243.30°C)‚ mass (.427g)‚ and percent yield (45.54) of the crystals were recorded. The FTIR was
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In Vitro Antifungal 1 In Vitro Antifungal Activity of Orthosiphon aristatus (Philippine Taheebo) against Candida albicans Sheenalyn R. Ching BS Biology University of the Philippines Los Banos In Vitro Antifungal 2 In Vitro Antifungal Activity of Orthosiphon aristatus (Philippine Taheebo) against Candida albicans Tabebuia impetiginosa is a one of the species of the well-known medicinal plant‚ Taheebo. It is common in Argentina
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