Purpose: The purpose of this was to determine the concentration of sodium carbonate in an unknown sample by titration. The solution of hydrochloric acid was prepared and standardized using Na2CO3. Observations: Week 1: Standardizing hydrochloric acid using sodium carbonate with bromocresol green indicator Table 1: Titration of sodium carbonate using hydrochloric acid Trial | Mass of Na2CO3 (g) | Burette Reading (mL) | Final Volume of HCl (mL) | | | Initial | Final | | 1
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Goals The main goal of this project is to learn how to identify the properties of an unknown ionic compound. In order to do this successfully the group has to use a variety of methods and run several tests on the unknown compound. By doing this the group will be able to identify the different chemical and physical properties of the compound that will help obtain the identity of the specific compound given. The group will devise two syntheses of the compound‚ and compare them for cost effectiveness
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← A Passage To Africa. (Narrative Article‚ Literary Analysis.) Poetry Analysis: An Unknown Girl- Moniza Alvi. 28May In the evening bazaar Studded with neon An unknown girl Is hennaing my hand She squeezes a wet brown line Form a nozzle She is icing my hand‚ Which she steadies with her On her satin peach knee. In the evening bazaar For a few rupees An unknown girl is hennaing my hand As a little air catches My shadow stitched kameez A peacock spreads its lines Across my palm.
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Bacteria Prac Aim: To observe the growth of bacteria on Agar plates Hypothesis: That the bacteria will grow in colonies throughout the agar plates except for the one with the anti-biotic loop because some will fight off the bacteria. Method: (Method taken from prac sheet) Plate 1: Use the swab to cover your entire agar plate in your bacteria. You only need one swab of bacteria but be careful to cover the entire surface of your agar in a layer of bacteria. Carefully place an Antibiotic Mastring
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The Tomb of the Unknown Soldier is a practice utilized throughout the world to memorialize soldiers who have died in modern wars without being identified. The first monument of this kind was the Tomb of Unknown Soldiers in Frederica‚ Denmark (1858)‚ which memorialized unknown soldiers who died in the First War of Schleswig. Another such Tomb of the Unknown Soldier is found in Philadelphia‚ Pennsylvania and was erected in 1866 to honor those soldiers who died during the American Civil War. The history
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Bacteria are often maligned as the causes of human and animal disease (like this one‚ Leptospira‚ which causes serious disease in livestock). However‚ certain bacteria‚ the actinomycetes‚ produce antibiotics such as streptomycin and nocardicin; others live symbiotically in the guts of animals (including humans) or elsewhere in their bodies‚ or on the roots of certain plants‚ converting nitrogen into a usable form. Bacteria put the tang in yogurt and the sour in sourdough bread; bacteria help to break
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antibiotics and host defenses * CLINICAL SIGNIFICANCE OF THE BACTERIAL CELL WALL: Gram-positive bacteria * Teichoic acid can cause colonization of the nasal epithelium. * Lipoteichoic acid causes an inflammatory response. * Gram-negative bacteria cell wall * Gram-negative bacteria only have a thin peptidoglycan layer. * Gram-negative bacteria only have a thin peptidoglycan layer. * The LPS layer is composed of lipids‚ proteins‚
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ylococcal bacteria. These bacteria are spread by having direct contact with an infected person‚ by using a contaminated object‚ or by inhaling infected droplets dispersed by sneezing or coughing. Skin infections are common‚ but the bacteria can spread through the bloodstream and infect distant organs. Skin infections may cause blisters‚ abscesses‚ and redness and swelling in the infected area. The diagnosis is based on the appearance of the skin or identification of the bacteria in a
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UNIT 5 Unknown Language Journal: Arabic Contents 1 Lesson Objectives (Functional‚ Grammatical & Lexical) Lesson 1 Lesson 2 Lesson 3 2 Teaching Methods and Techniques Class Management Interactive Patterns & Activities Use of Materials 3 Contrastive Analysis 4 Summary Lesson Objectives: (3 lessons – 90 mins.) Lesson 1 The aim of this first class was to provide a very general introduction to the Arabic language‚ how it is written‚ how it is pronounced‚ and
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identify a metal‚ each with varying amounts of accuracy. In order to test some of these methods‚ thermal expansion‚ density‚ and specific heat were used to identify two small metal rods. The overall purpose of this experiment was to identify an unknown metal using the three previously stated properties. This means that the percent error should be relatively low‚ meaning that there would be little difference between the values measured in our experiment and the true values of the metal. Density
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