Year 10 Science Semester Two Examination - 2012 TIME ALLOWED 15 MINUTES READING 1 HOUR AND 15 MINUTES WRITING Instructions to candidates: 1) Do not write or mark the examination booklet in any way during reading time. 2) Please check that, aside from this test booklet, you also have a multiple choice answer sheet and data sheet. 3) There are 14 pages in this booklet including this one. Please check to ensure that this is so. 4) Note that the time allocated for the examination is 75 minutes and
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adapter to a 500-mL filter flask. a. close vacuum adapter w/ cork and make sure the inlet tube does not reach the surface of the water in the filter flask b. make sure any water from the trap does not get sucked back into the reaction flask c. glass tube must not dip below the surface of the water in the trap 3) Note the differences on pg.77 of G&M fig. 2.65(b) a. it does not use a water aspirator or house vacuum b. Fit #7 one-hole rubber
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Carmel Vijay Chemistry Lab 227 Zach Sailor November 8, 2013 Observing Chemical Reactions Beginning Question When a chemical reaction takes place, is it always accompanied by a physical change? Explain. Bunsen burner The Bunsen burner is a device in use these days to safely burn a continuous stream of a flammable gas such as natural gas, propane, or butane. The completeness of the combustion reaction affects the amount of air mixed with the gas stream. When a gas stream is well mixed
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CHEMISTRY CHEMISTRY (CLASSES XI–XII) Rationale Higher Secondary Stage is the most crucial stage of school education because at this stage specialised discipline based, content oriented courses are introduced. Students reach this stage after 10 years of general education and opt for Chemistry with a purpose of mostly for pursuing their career in basic sciences or professional courses like medicines, engineering, technology and studying courses in applied areas of science and technology at tertiary
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this reaction is electrophilic substitution. Hydrolysis While solvolysis often refers to an organic chemistry context, hydrolysis is very common in inorganic chemistry, where aqua complexes of metal ions react with solvent molecules due to the Lewis acidity of the metal center. For example, aqueous solutions of aluminium chloride are acidic due to the aqua-aluminium complex losing protons to water molecules, giving hydronium ions which lowers the pH. In organic chemistry, hydrolysis reactions often
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actually written. When reading about the way that circumstance causes a certain reaction I think we are able to broaden our ability to relate to the differences among people in our society. If we only apply our own experiences and cultural background to everyone around us we are almost certain to judge and interpret reactions or behaviors incorrectly. By having a broader understanding that circumstances and reactions differ among people of different ages, cultures and even in people within our own
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Stoichiometry ________________________________________ Stoichiometry is simply the math behind chemistry. Given enough information, one can use stoichiometry to calculate masses, moles, and percents within a chemical equation. ________________________________________ ________________________________________ What is a Chemical Equation? In chemistry, we use symbols to represent the various chemicals. Success in chemistry depends upon developing a strong familiarity with these basic symbols.
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projects, reports, and homework. COURSE CONTENT Fall Semester: 1st Marking Period Matter Atomic Structure Radioactivity Electron Clouds and Probability Fall Semester: 2nd Marking Period Periodic Table Periodic Properties Chemical Nomenclature Chemical Reactions Fall Semester: 3rd Marking Period The Mole Stoichiometry Chemical Bonding Polarity of Molecules TEXTBOOK/REFERENCE Zumdahl, Zumdahl and DeCoste. 2003. The World of Chemistry. McDougall Littel MATERIALS Bound Composition Notebook (for taking notes)
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air to conduct the heat. Pan-searing a steak is considered dry-heat cooking because the heat transfer takes place through the hot metal of the pan. Note that the browning of food (including the process by which meat is browned, called the Maillard reaction) can only be achieved through dry-heat cooking. Examples of dry-heat methods include: * Roasting & Baking * Grilling & Broiling * Sautéing & Pan-Frying * Deep-Frying Moist Heat Cooking Moist heat cooking methods include any techniques
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Determining the Limiting Reactant and Percent Yield in a Precipitation Reaction Objectives: • Observe the reaction between solutions of sodium carbonate and calcium chloride. • Determine which of the reactants is the limiting reactant and which is the excess reactant. • Determine the theoretical mass of precipitate that should form. • Compare the actual mass with the theoretical mass of precipitate and calculate the percent yield. Materials: Balance 0.70 M sodium carbonate solution
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