CHEMICAL REACTIONS: ACID-BASE BUFFERS Short Overview Acids and bases represent two of the most common classes of compounds. Many studies have been done on these compounds‚ and their reactions are very important. Perhaps the most important reaction is the one in which an acid and base are combined‚ resulting in the formation of water (in aqueous solution) and a salt; this reaction is called neutralization. A buffer solution is a solution that contains both an acid and a salt
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Therefore .50 cm is the correct answer. 17. A quartz sphere is 14.5 cm in diameter. What will its change in volume if it is heated from 30Cº to 200Cº? I had the formula: V = VoT V = ? (Volumetric change in the sphere. We are solving for this.) = 1e -6 (Cº)-1 (Coefficient of volumetric expansion. It is on page 388 listed as .) Vo = (4/3) * (.145 m/2)3 (Initial volume. You must take the diameter and divide by to to get the radius. Then you must stick it in the formula for
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monthly bills for water users in various classes or categories. Pricing structures The tariff structures used in urban water supply also vary across various service providers. The water charged could be in the form of non volumetric flat rate tariff‚ non volumetric water tariff‚ uniform metered tariff‚ metered block tariffs or a combination of above. Determination of annual tariffs The annual tariffs be determined on the basis of different levels of cost. The cost profiles described
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nickel‚ which is 2cm. The next part of the experiment was measuring temperature. I found that water boils around 95ºC at 6600ft. Ice also has a significant effect on the temperature of water from the tap. Ice dropped the temperature about 15ºC. Volumetric measurements were the basis of the 3rd part of the experiment. It was displayed during this experiment that a pipet holds about 4mL and that there are approximately 27 drops/mL from a short stem pipet. Part 4 introduced the student to measuring
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Abstract For the amount of aspirin in a commercial tablet to be determined‚ different solutions of acetylsalicylic acid mixed with NaOH were created at different concentrations. All the different solutions were then analysed using Novaspec photometer‚ which allowed for a graph to be created and a line of best fit to be made. The amount of aspirin in a commercial tablet was found to be 350mg. Introduction The molecular formula for aspirin‚ also known as acetylsalicylic acid‚ is C9H8O4. It is most
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Purity of Aspirin Objectives - To research‚ using various sources‚ the history of aspirin‚ its use in medicine‚ methods of synthesizing it and of measuring its purity - To compare the % purity of a branded aspirin tablet with a generic aspirin tablet - To compare 2 methods of composition analysis of the two types of aspirin Research
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Red litmus paper 2 × small funnels 250 mL volumetric flask 3 × 250mL conical flask 20mL pipette Pipette filler 5 mL measuring cylinder Burette and stand Spatula White tile Electronic heater Bench mat Safety glasses 3. Procedure 1) Accurately weigh about 1.3g of fertiliser. 2) Transfer the sample of fertiliser to a 250mL volumetric flask. Rinse the weighing bottle with a bit of distilled water and add this to the contents of the volumetric flask. Add more water until the flask is almost
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from careful weighing. This experiment included a standard solution‚ which according to Lewis‚ R. and Evans‚ W. 2011‚ “is a solution of known concentrations”. They also stated that “the procedure in finding the concentration of a solution is called volumetric analysis. It involves reacting a solution
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1. Using diagrams and/or graphs‚ explain the following terms: a. Pressure Head pressure head [′presh·ər ‚hed] (fluid mechanics) Also known as head. The height of a column of fluid necessary to develop a specific pressure. The pressure of water at a given point in a pipe arising from the pressure in it. b. Total Discharge Head Total discharge head refers to the actual physical difference in height between the liquid level in the pit and the highest point of the discharge pipe or water level in
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Experiment 1 Lab Report Title: Determination of caffeine content in tea bag sample by UV spectroscopic method Higher diploma in Pharmaceutical Science-Year 1 AS114202-1TM Fundamental Analytical Chemistry ASD3008 Lab Group 6: Ng Chung Hin 130439161 Wong Tin Yau Tony 130252529 Ng Wai Kin 130031247 Tam Chun Kit 130191034 Mau Kwan Yiu 130395762 Date of Experiment: 7/3/2014 Content Introduction Objectives Methodology Results Discussion Conclusions References Introduction
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