Physical Properties of Organic Molecules Abstract Identifying the physical properties of compounds can be useful in several ways. It helps us to determine the structure of certain compounds‚ the purity of substances and if a substance is not pure we can figure out how to separate contaminating substances from a compound. In this experiment‚ I learned how to determine a solid’s melting point and why some melting point ranges may be broader than others.
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Experiment 15 The Purification of Water Date Performed: 9/25/2012 Joe Shmoe Date Submitted: 9/26/2012 Chemistry 1046L-sec07 Lab TA: Blankity Blank Purpose: The purpose of this experiment is to learn about the various processes by which water is processed and treated. This experiment will involve removing chemical impurities in water through using techniques such as absorption spectrophotometry‚ sample collection‚ serial dilution‚ filtration PH and graphical analysis. If this
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"father of biodiversity‚" -- said‚ "It is reckless to suppose that biodiversity can be diminished indefinitely without threatening humanity itself." Abiotic component From Wikipedia‚ the free encyclopedia Jump to: navigation‚ search In ecology and biology‚ abiotic components (also called abiotic factors) are non-living chemical and physical factors in the environment‚ which affect ecosystems. Abiotic
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Obtain a microscope glass slide. Hold it by the edges and wet it with water. Wipe both sides dry with a paper towel. Always hold the slide by the edges or you will leave fingerprints on the slide. ____5. Clean the coverslip in a similar manner. CAUTION: It is very fragile. You can avoid breaking it by wiping both sides at once as shown in figure 1. ____6. Using the medicine dropper‚ place one drop of water near the centre of the glass slide. This water is called a mounting medium. It helps produce a clear image
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HSC BIOLOGY TOPIC 2: BLUEPRINT OF LIFE HSC BIOLOGY TOPIC 2: BLUEPRINT OF LIFE 1) Evidence of evolution suggests that the mechanisms of inheritance‚ accompanied by selection‚ allow change over many generations. 1.1.1 Outline the impact of evolution of plants and animals of: * Changes in physical conditions in the environment * Changes in chemical conditions in the environment * Competition for resources
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Water Rockets Abstract Water rockets have been a source of entertainment and education for many years. They are usually made with an empty 2-litre PET bottle by adding water and pressurizing it with air for launching. Water rockets are used to help students understand the principle of aeronautics. Aim The aim was to design and perform an experiment to determine the volume of water to use in order to obtain maximum height for the bottle rocket. Introduction Bottle rockets are often used in
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purpose of this experiment was to discover if using sugar and tonic water with water would increase the growth rate of barley. In this experiment‚ we changed two variables‚ the independent variables sugar and tonic water. We added one tablespoon of each substance to four ounces of water which will be used to nourish the plant. We tested these experimental controls to determine if any of the substances would help accelerate the growth of the barley. If the sugar water or tonic water mixture successfully
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In this experiment I will investigate the temperature of 50cm³ of water before and after I have added calcium chloride‚ I will gradually increase the amount of calcium chloride by 1 gram to see if there is a significant change. When Calcium Chloride is mixed with water it performs an exothermic reaction which makes new bonds between the salt (Calcium Chloride) and the water. This will therefore make the solution of the reaction increase in temperature. Exothermic reactions transfer energy
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Jessica Robins Lab 3: Properties of Organic Compounds Introduction Distillation is a physical process used to separate chemicals from a mixture by how easy they vaporize. The temperature rises unit it reaches the temperature of the lowest boiling substance in the mixture while the other contents of the mixture remain in their original phase (until the most volatile substance has all boiled off) as it’s heated. Hot vapor results and passes into a condenser and is then converted to a liquid
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Friction Peter Jeschofnig‚ Ph.D. Version 42-0262-00-01 Lab Report Assistant This document is not meant to be a substitute for a formal laboratory report. The Lab Report Assistant is simply a summary of the experiment’s questions‚ diagrams if needed‚ and data tables that should be addressed in a formal lab report. The intent is to facilitate students’ writing of lab reports by providing this information
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