Measurement of the Heat of Neutralization of an Acid CHM 152IN CRN: February 5‚ 2000 I. Purpose of Experiment The purpose of this lab is to measure the heat released in the reaction of an acid and a base. This will demonstrate an enthalpy reaction‚ showing energy being released. II. Chemicals and Equipment The following chemicals and equipment will be utilized for the experiment: |Chemicals |Equipment
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presentation summary Description of the experiment * Aim: To observe the reactions of sulfuric acid as an oxidising agent and as a dehydrating agent. Equipment: * 20mL of concentrated sulfuric acid * 20mL of 2mol/L sulfuric acid * 2 small pieces of each of copper‚ zinc and iron * Sandpaper * 10 test tubes * Test tube rack * 2g of sugar crystals (sucrose) * 2 wooden ice-cream sticks * 10mL measuring cylinders Steps: A: Sulfuric acid as an oxidising agent 1. Clean
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coke over the rust and it will loosen it so it is easier to remove. What is acid? Acid is a mixture of pH‚ other acids‚ hydrogen ions and hydroxide ions. The more hydrogen ions in the acid more powerful the acid will be. Acid is in everyday things from eating and drinking to sleeping. Acid is in coffee‚ toothpaste‚ oranges‚ fruit‚
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Experiment V02 An analysis of aspirin tablets Procedure a. Weigh accurately a definite number of aspirin tablets (two or three tablets weighing no more than 1.5 g) into a 250 cm3 conical flask. Initiate the hydrolysis of the aspirin by adding 25 cm3 of 1.0 M sodium hydroxide by pipette‚ diluting with approximately the same volume of distilled water. Warm the flask over a tripod and gauze for ten minutes to complete the hydrolysis. b. Cool the reaction mixture and transfer with washings to
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Experiment 6 Preparation and reactions of boric acid Objectives: To prepare boric acid from sodium tetraborate (borax) To carry out tests on the prepared sample of boric acid To study the physical and chemical properties of boric acid Introduction: Boron is an element in the p-block of the periodic table. It has the electron configuration of 1s22s22p1 and is in group 3 or goup 13 (IUPAC classification). In nature‚ it consists of two isotopes 10B (19.6%) and 11B (80.4%). Boron is bonded
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add acid to water or water to acid? You should always add acids to water. 3. Where should you dispose of broken glass? You should dispose broken glass in a protective container. 4. What should you do if you spill a chemical on your hand? If the chemical spill is on a small area you must immediately flush the area with a large amount of water and then wash it with soap. Remember to check the MSDS for the chemical and follow all instructions. Experiment 1 For directions click on Experiment 1‚
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EXPERIMENT NO 1. MATERIALS Sofdriks (coke) Dropper Vinegar Milk (yakult) Litmus paper Beer Ampalaya fruit Distilled water Calamasi PROCEDURE: 1. Prepare the materials that needed in experiment. 2. Using dropper‚ get a little amount of coke‚ vinegar‚ milk‚ beer‚ and distilled water then drop to red and blue litmus paper. Record the result. 3. Squeeze the
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of acetylsalicylic acid Results and Data treatment (A) Preparation of aspirin i) Details about the reactants Reaction of the acetylation of salicylic acid is following From the balanced reaction above‚ it can be seen that the stoichiometry between salicylic acid and acetic anhydride is 1: 1. In this experiment‚ 21.7mmol of salicylic acid was used to react 6.0mL of acetic anhydride and salicylic acid was limiting reagent. The expected amount of salicylic acid used: 21.7/1000*138
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Acids‚ Bases and Buffers Lab Acids‚ Bases and Buffers Lab Results: The experimental results for part one is as follows: Part One Data Table | Initial pH | Final pH | Test Tube A | 6 | 1 | Test Tube B | 4 | 4 | Test Tube C | 4 | ----- | Test Tube D | 4 | 4 | Test Tube E | 6 | 11 | The experimental results for part two is as follows: Part Two Data Table | Before CO2 was Added | After CO2 was Added | Colour | Blue/green | Light green/yellow | pH Level | 8.0pH | 5.0pH |
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The Stereochemistry of Bromine Addition: Bromination of trans-Cinnamic Acid Pitak Chuawong Objectives 1. To perform bromination of trans-‐cinnamic acid 2. To investigate stereochemistry of bromination reaction Introduction Alkenes undergo electrophilic addition to give alkyl halides. When bromine is used as a
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