UNIVERSITY OF ZIMBABWE Programme Bscd (ІІ) Course CH202 Practical Number 4 Title d-block elements- Manganese AIMS /OBJECTIVES * To understand the reactions of manganese * To prepare Mn(acac)3 and calculate percentage yield * To calculate the percentage of Mn and acetyl acetone
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Muscle and Nerve Preparation Preparation of Ringer ’s solution Dissolve 6.5 g of sodium chloride (NaCl)‚ 0.14 g of potassium chloride (KCl)‚ and 0.20 g of sodium bicarbonate (NaHCO3) in 800 mL of distilled water. Also‚ dissolve 0.16 g of hydrated calcium chloride (CaCl2.2H2O) and 0.39 g of hydrated magnesium sulfate (MgSO4.7H2O) in 100 mL of distilled water. Add the 100 mL cautiously to the 800 mL‚ stirring vigorously. Then make the final volume equal to 1 liter by adding more distilled water
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PHARMACEUTICAL CHEMISTRY Chapter 5 – Gastrointestinal Agents • Inorganic agents used to treat gastrointestinal disorders includes: 1. Products for altering gastric pH 2. Protectives for intestinal inflammation 3. Adsorbents for intestinal toxins 4. Cathartics of laxatives for constipation ANTACIDS o neutralize excess hydrochloric acid o inactivate the proteolytic enzyme‚ pepsin o alkaline bases Results of Hyperacidity: o Gastritis – inflammation of the gastric mucosa o Peptic ulcer
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The purpose of this lab is to test the reactions of primary‚ secondary‚ and tertiary alcohols with acid and with an oxidizing agent. Materials: chemical safety goggles dropper bottles including: butan-1-ol butan-2-ol 2-methylpropan-2-ol potassium permanganate solution‚ KMnO₄(aq) (0.01 mol/L) concentrated hydrochloric acid‚ HCl(aq) (12 mol/L) eyedropper lab apron protective gloves test tube rack Procedure: 1) Appropriate safety apparel including chemical safety goggles‚ apron‚ and
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solute/solvent/solution used during the experiment. Name Concentration (%) Volume (ml) Qualitative Observations Glucose (C6H12O6) 5 different types: 4%‚8%‚12%‚16%‚20% 5.0 ± 0.1 ml Clear‚ Colourless Name Concentration (M) Volume (ml) Qualitative Observations Potassium Permanganate (KMnO4) 0.010 M 1.00 ± 0.05 ml Intensely pink/purple Sulphuric Acid (H2SO4) 1 M 5.0 ± 0.1 ml Clear‚ Colourless Data Collection:- Table: 2- Shows the concentration of glucose solution (%) and the total time taken (s) by the
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In this experiment the solubility product constant of the salt magnesium oxalate (MgC2O4)will be determined. The system of interest exists as a solid in equilibrium: Precipitation reaction of EXPERIMENTAL METHODS Preparation of the 0.15M Potassium Permanganate (KMnO4) solution {text:list-item} B. Prepare precipitation mixtures 1. Obtain three labeled 20-mL vials from the cart. 2. Burets are set up in the lab with 0.250 M MgSO4 and 0.250 M Na2C2O4. Refer to Table 1‚ and add
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converted to product and the rate of reaction. The remaining substrate from the reaction is equal to the initial amount of the substrate minus the amount converted to product by the enzymatic action. MATERIALS 3% hydrogen peroxide Sulphuric acid (1M) Potassium permanganate solution Soaked beans‚potatoes‚apple and chicken meat Razor blades Lime juice Test tubes and racks Ice‚beakers Watch plates Burettes Water bath Conical flask METHODS Experiment 1:Observing redox
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DEPARTMENT OF PURE AND APPLIED CHEMISTRY Visayas State University Visca‚ Baybay City‚ Leyte Name: Alecsa May S. Celaya BS-Chemistry 3 Date Submitted: December 19‚ 2014 Lab. Schedule: MW 2:00 – 5:00 pm Rating: Group No. 11 Experiment No. 5 Preparation of KAl(SO4)2•12H2O (Alum) OBJECTIVES This experiment aimed to: prepare KAl(SO4)2•12H2O‚ commonly referred to as alum‚ from aluminum metal from a canned soft drink‚ and determine the mass of the alum collected and its percent yield
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Preparation of Bromotriphenylmethane Abstract The structure of a major component of star anise oil was derived by analyzing its IR spectroscopy melting point of after oxidation and purification. From the evidence obtained‚ it was concluded that the exact structured should be p-methoxybenzoic acid. Introduction The purpose of this experiment is to determine the structure of the major component of star anise oil. It is already known that this component has a molecular formula C10H12O. This
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Instructions You must SHOW WORK AND PROBLEM SET-UP for CREDIT. You have to SUPPORT your answers by calculations and/or reasoning. If you do not understand something in the assignment or are not sure how to approach a question - EMAIL me before you submit. This assignment must be submitted no later than November 22nd‚ 2011. 1. What is a true solution? Explain why the solute does not settle out of a solution. Is it possible to have one solid dissolved in another? Explain. In metals it would
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