Introduction: Porcellio scaber or commonly known as ‘slater’, belong to the biological group Phylum; Arthopada and Class; Crustacea. Animals that are associated with this group include; most Crustacea, shrimp, crabs and lobsters. Slaters have become terrestrial, although this may differ in physical appearance. As they have recognisable dark grey flattened bodies, being about 17mm in size and have a rough exoskeleton. They also have a pair of prominent antennas and seven pairs of legs. Slaters
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The Determination of Boiling Points and Melting Points of Organic Compounds During this laboratory session, we will practice determining the boiling point of a liquid organic compound and the melting point (or we could call it the freezing point) of a solid organic compound. The boiling point of a liquid is the temperature at which the pressure of the vapor above a liquid equals the existing pressure. As we heat a liquid, the pressure of the vapor above the liquid slowly increases. When this pressure
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EXPERIMENT 3 GROUP B AIM: To find the overall efficiency of plate column operating under total reflux, for a binary system (iso-propanol & n- propanol). APPARATUS: * Distillation Column with reboiler * Automatic digital refractometer * Two fluids with different volatilities. PROCEDURE: * Distillation column was filled with the two fluids. * Then we switched on the heater and set the temperature to 126.6 ̊C * And then we allow the system to reach the equilibrium.
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The Determination of Boiling Points and Melting Points of Organic Compounds During this laboratory session, we will practice determining the boiling point of a liquid organic compound and the melting point (or we could call it the freezing point) of a solid organic compound. The boiling point of a liquid is the temperature at which the pressure of the vapor above a liquid equals the existing pressure. As we heat a liquid, the pressure of the vapor above the liquid slowly increases. When this pressure
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Simple and Fractional Distillation I. Introduction Distillation is one of the oldest and still most common methods for both the purification and the identification of organic liquids. It is a physical process used to separate chemicals from a mixture by the difference in how easily they vaporize. As the mixture is heated, the temperature rises until it reaches the temperature of the lowest boiling substance in the mixture, while the other components of the mixture remain in their original
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ABSTARCT Determination of boiling point and melting point of the organic liquids, in practice determining the boiling point of ethyl and Isopropyl Alcohol and the melting point of benzoic acid and Urea. However, the boiling point of a liquid is the temperature at which the pressure of the vapor above a liquid equals the existing pressure. As we heat a liquid, the pressure of the vapor above the liquid slowly increases. When this pressure equals the pressure presented in the container, the
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ISP 203A Concept Redesign Extra Credit Step 1: Hydrologic Cycle Step 2: 1. Third Grade Student = Bill Nye Episode 47 (The Water Cycle) 2. Grand/parent or other non expert = NASA’s video explaining the water cycle 3. A professional = "Water Vapor, the Hydrological Cycle, and Climate Change" by Isaac M. Held, Senior Research Scientist, head of Weather and Atmospheric Dynamics Group, Geophysical Fluid Dynamics Laboratory/NOAA (Princeton,
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1.3 Lab: Sharpening Scientific Skills Problem: How can I apply my skill as a scientist to learn more about a substance? Materials: 1 250 ml beaker 1 hot plate 1 pair of beaker tongs 2-3 teaspoons of copper (II) sulfate pentahydrate Observe and Describe the substance (state whether your observations are qualitative/quantitative or direct/Indirect) Blue Powder Crystal Shiny Describe what tests or investigations you could do to learn more about the substance: freeze add water
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HOW MUCH WATER IS IN THE HYDRATE? LABORATORY REPORT PREPARED BY: CHEMISTRY 113 LAB February 2016 PROFESSOR TEACHER ASSISTANT: Introduction: A hydrate is a substance that water. It is important to know how much water is in the hydrate because when performing scientific experiments, it is required to know the mass of each substance. If the substance is heated, then the hydrate can lose the water and the water evaporates, which is called an anhydrous substance. Since water is polar
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Drying Agents Drying agents (also called desiccants) come in various forms and have found widespread use in the food, pharmaceuticals, packing, electronics and many manufacturing industries. Every time an organic compound is in contact with water, a small amount of substance will be dissolved in it and also a quantity of water will be found in that organic compound. It is considered that water is hard to be removed from the compounds because they are forming strong bonds with water molecules (e
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