beakers‚ graduated cylinder‚ drying oven‚ Na2CO3 (sodium carbonate)‚ stir rod‚ scoopula‚ DI water‚ watch glasses‚ filter paper‚ ring stand‚ funnel‚ water samples with CaCl2 (calcium chloride) Procedure: 1. Measure out a 20ml sample of each A‚ B‚ and C hard waters 2. Place samples in separate beakers 3. Add .500g of sodium carbonate to each water sample beaker (absolute maximum concentration is considered to be 180 mmole‚ so this amount of sodium carbonate will allow for such a number‚ if present)
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are filled nitrogen gas. Hazardous sodium metal is also produced with the nitrogen so the potassium nitrate adapts with the sodium to make the hazardous sodium oxide less harmless. The uses of the stoichiometry cffffffffffffffffffffffffffffffffffeeeeer bags are located inside automobiles. The air bag is in front of the passenger seat inside the dashboard. Once the vehicle gets into a crash the air bag pops out. The air bags are filled nitrogen gas. Hazardous sodium metal is also produced with the nitrogen
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for making window panes‚ bulbs &tumblers in soda glass. Soaps: [pic] Soaps are the detergents used since long. Soaps used for cleaning purpose are sodium or potassium salts of long chain fatty acids‚ e.g.‚ stearic‚ oleic and palmitic acids. Soaps containing sodium salts are formed by heating fat (i.e.‚ glyceryl ester of fatty acid) with aqueous sodium hydroxide solution. This reaction is known as
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FACTORS AFFECTING THE LYTIC ACTIVITY OF LYSOZYME ’ A. N. SMOLELIS" AND S. E. HARTSELL Laboratories of Bacteriology‚ Department of Biological Sciences‚ Purdue Univer8ity‚ Lafayette‚ Indiana Received for publication October 28‚ 1951 Since the initial discovery of lysozyme by Fleming (1922)‚ nuimerous attempts have been made to describe the properties of this enzyme. The absence of a reliable method for the determination of enzymatic activity‚ however‚ has contributed to the incompleteness and
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Sodium is an electrolyte that controls the fluids in the body’s tissues and cells. It is also responsible for regulating blood pressure and volume‚ helping transmit impulses‚ and regulating the balance of blood and body fluids. I believe it is important to monitor your sodium intake in order to stay in good health. Kidneys are the most common concern when too much sodium is being taken in because it can lead to damage to the heart. When there is an excessive amount‚ the kidneys are unable to
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| 100mL beaker + 20mL water + sodium carbonate solution | 64.2 grams | Watch glass | 32.2 grams | Precipitate + filter paper + coffee filter | 2.20 grams | Precipitate + 150mL + coffee filter | 84.1 grams | Uncertainty of electronic balance: ±0.001 grams Uncertainty of 100 mL beaker: ±0.05 mL Uncertainty of 150 mL beaker: ± 0.05 mL Qualitative Data Before reaction: * Lead nitrate solution: translucent‚ dissolved‚ looks like water * Sodium carbonate solution: translucent
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dialysis. In this part we studied starch and sodium chloride for dialysis activity. In Part A We hypothesized that NaCl existed in 1-3 and AgNO existed 2-4. In Part B We hypothesized that there will be more changes in the cell then outside the cell. In Part C We hypothesized that there will be a difference due to the different environments that are provide to help change the appearance of a molecule. Procedure A. Qualitative testing for sodium chloride and starch We got 6 clean test tubes
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this experiment is to separate sodium chloride/charcoal and sodium chloride/copper(II) chloride mixtures. Equipment requiredBalanceFilter funnel standFilter funnelBunsen‚ tripod and gauze matWatch glassGlass rodBeakers (two 100mL)Graduated cylinder (25 mL)Filter paper (Whatman No. 1—three 12.5 cm sheets)Sodium chloride/charcoal mixture (4 g)Sodium chloride/copper(II) chloride mixture (8 g)Ethanol (25 mL)Distilled waterBoiling chipProcedureA Separation of a Sodium Chloride and Charcoal Mixture#1
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benzoate by an electrophilic aromatic substitution reaction. Summary of procedures: Add sulfuric acid to the mixture of benzoic and methanol‚ heat up the mixture to 65 oC. Transfer the mixture to the separatory funnel and add ether‚ sodium bicarbonate and saturated sodium chloride-brine solution‚ drain the bottom layer each time and remain ether layer. Decant the solution with calcium chloride‚then evaporate the ether by steam bath and cool down. The product is methyl benzoate. Pour methyl benzoate
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reactants and products of the reaction‚ to determine the actual yield vs theoretical yield‚ and to accurately calculate percent yield. The mass of the weighing dish was .6 grams and the mass of the weighing dish plus the sodium carbonate was .72 grams thus the mass of the sodium carbonate alone was .12 grams. After the precipitation reaction the mass of the filter paper and calcium carbonate was 1.8 grams and the calcium carbonate was .8 grams. Through this experiment we used a precipitation reaction
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