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    Hard Water Analysis

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    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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    Emission Spectra & Flame Tests Intro The emission spectrum is used in modern chemistry to help further studies of wavelengths and the spectrum. When a metal in a compound reacts in a flame and produces a color‚ it helps to show the strongest color in the emission spectrum. The  purpose of performing these operations on the flame was to see how different metals would react. Using a spectroscope‚ it is possible to observe the line emission spectrum produced by sunlight‚ artificial light‚ and

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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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    Chemistry in Daily Life

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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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    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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    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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    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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    Water Testing Lab

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    ion was dropped into the test solution containing the calcium ion‚ the calcium ion was no longer attracted to the water‚ but was instead attracted to the oxalate. This attraction resulted in a compound that is insoluble in water‚ a precipitate. The sodium and chloride ions are soluble in water‚ so they did not experience a change. In the Home 1 water sample‚ there were medium amounts of the calcium ion‚ medium to high amounts of the chloride ion‚ and a small amount of the sulfate ion. Comparatively

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    Lab butter

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    Introduction Butter is a dairy product made by churning of cream‚ mostly from fresh cow’s milk‚ with the additional of salt (Bylund‚ 1995). Salt (Sodium Chloride) is used as flavoring and preservative as it inhibit the microbial growth. Salt content in butter is limited by legislation in some countries. For example‚ in Thailand‚ the maximum sodium chloride content in butter shall not exceed 4 percent of total butter weight (Thai Ministry of Public Health‚ 2001). Therefore‚ analytical methods are

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