E XPE RIME NT 4 . 5 Reactions of acids Aim To investigate and compare some reactions of a strong acid‚ hydrochloric acid‚ and a weak acid‚ ethanoic acid (common name‚ acetic acid) Equipment Dropper bottles containing: • 0.1 M hydrochloric acid‚ HCl • 0.1 M ethanoic acid (acetic acid)‚ CH3COOH • 0.1 M sodium hydroxide‚ NaOH • 1 M hydrochloric acid‚ HCl • 1 M ethanoic acid (acetic acid)‚ CH3COOH • universal indicator solution • limewater (calcium hydroxide‚ Ca(OH)2) Marble chips (calcium carbonate
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To identify an unknown sample‚ there were several steps that helped determine the molecular structure and the name of the sample. When Belle #9 (unknown) was given to me‚ it’s physical state and color was recorded on the data sheet. Since the sample was a pure liquid‚ there was no need for distillation. Next‚ a solubility test was given. When one drop of the unknown liquid was added to about 2 mL of water‚ the sample was tested to be soluble due to the dissolubility between the two compounds. By
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The Effects of varying p-Nitrophenyl Phosphate concentrations on Alkaline Phosphatase Activity Nathan Overholt Louis Settembrino March 5‚ 2002 Abstract: The enzyme Alkaline Phosphatase was set up in solutions of varying p-nitrophenyl phosphate concentrations. A fixed time assay was used to find the Michaelis constant and Vmax. All solutions were incubated at 30 C° for 30 mins. Absorbances were measured at 405 nm‚ and the Km was found to be 0.002 M (pNPP) and the Vmax to be 0.433 A/min. Introduction:
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The full strength 1M HCl acid had a pH level of 3.12 (Table 3.1). Sample A2 to A4 remained in the pH 3 level‚ while sample A5 and A6 had a pH range of 4 (Table 3.1). The pH level for 1M HCl dilutions slightly increased between each sample (Table 3.1). The diluted solutions of 1 M NaOH showed a few unexpected results. The original solution of 1 M NaOH was at a pH level of 11.50 (Table 3.1). However‚ the pH of sample B2 increased to 12.81 (Table 3.1). The remaining samples had a decreasing pH pattern
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The purpose of this lab is to gain experience because an Iodometric titration was preformed and to determine the molarity and mass percent of an analysts in an commercial product. In this experiment my partner and I prepared 500mL of 0.07M sodium thiosulfate pentahydrate. As well‚ we added 0.05 grams of sodium bicarbonate and mixed it together with DI water. We got 60 mL of sodium thiosulfate solution in a clean 100-mL beaker. Then filled the buret to just above the 0 mL mark with sodium thiosulfate
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Purpose: The purpose of this experiment is to analyze four drinking water samples from different places using four of the standard drinking water tests required by the EPA. The experiment will be performed by a four person group‚ with each person providing a different water sample. The four tests to be performed are: pH‚ conductivity‚ phenolphthalein and total alkalinity‚ and total and non-carbonate hardness. Data from these four tests will be gathered and analyzed‚ drawing conclusions “about
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as opposed to a physical challenge‚ but there’s no denying that you do work your legs‚ lung and ligaments. Everyday‚ daring people all over the world are participating in extreme sports like adventure racing‚ bull-fighting‚ in-line skating‚ bungee jumping‚ snow boarding and skateboarding. All of these sports involve a serious risk‚ and that’s why they are called Extreme Sports. Starting with one of the most vigorous and growing sport in North America‚ adventure racing in 1999 will see up to 80 competitions
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not take the card with you. 5 .If you love to relax on the beach in the sunshine‚ chances are that you’ll not like touring around on a coach in the Scottish highlands. 6. Whatever your passion‚ whether it be zip lining through the Amazon‚ bungee jumping in New Zealand or romantic hidden beaches in the Caribbean‚ you will get much more out of your holiday and be much more relaxed if you plan a holiday you all enjoy. 7 .The more you know‚ the better you can enjoy or appreciate the place and their
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ECOLOGY AND BIODIVERSITY OF AGRICULTURALLY IMPORTANT RICE FIELD ARTHROPODS J. Diraviam P. G. and Research Department of Zoology Loyola College Chennai - 600 034 Studies on the ecology and biodiversity of arthropods which are agriculturally important were undertaken from January 2002 to December 2003 in five seasons in 13 farmers’ rice fields in the districts of Kancheepuram‚ Tiruvallur‚ Vellore and Villupuram of the north-eastern zone of Tamil Nadu State‚ India. Most of the studies
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Quiz 2 Mahnoor butt 110003 Case study: Jumping off place Q 1: In what way will the culture of Spain be different from U.S? In answering this question refer to figure 4-5‚ 4-6‚ 4-7. Ans: if we compare the cultures of United States and Spain‚ keeping in view the hofstede’s dimensions‚ following cultural differences were found: 1. Power distance: This aspect deals with fact that all individuals in societies are not equal. It is defined as: “The extent to which less powerful members of institution
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