We did have some small hiccups in our experiment‚ but less than most of the class‚ for example‚ after distillation‚ when we were drying our organic layer (containing our sample) with anhydrous sodium sulfate‚ we were unable to achieve to clear color we were told to expect even though our sodium sulfate beads we no longer clumping. We spent extra time trying to gain the ‘clear’ color for our sample to be run through GC‚ but eventually had to run it ‘as-is’ and it turned out to be relatively free of
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useful solvent. A solvent is a substance which ____________ other substances. A substance which gets dissolved is called a ______________ and the end result‚ when one substance dissolves in another‚ is called a ______________. For example‚ when copper sulfate dissolves in water‚ the solvent is _________________‚ the solute is ______________ and the result is
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Evaporating dish * Candle * Matches * Ammonium hydroxide * Watch glass * Phenolphthalein * Paper towel * Cornstarch * Iodine * Cup * Alka-Seltzer tablet * Pipet * Milk * Vinegar * Copper II sulfate * Lead II nitrate Safety: * Goggles were worn. * Aprons were worn. * Lab station was cleaned up directly following experiments. * Hands were washed after experiments. * No eating or drinking took place in the lab. *
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Experiment: • Electrodes (metal strips of Zn and Cu) • Electrolytes (both sulfate solutions) • Volume of solutions used in the galvanic cell • Length of saltbridge • Saltbridge solution (0.1 M KCl solution) • Surface area of electrode dipping into the electrolyte solutions. Procedure: 1. Use 2x 50 mL beakers to make up the following half cells‚ fill with 25 mL 1M zinc sulfate and 1M copper sulfate solution in each beaker. 2. Use one 50 mL beaker‚ fill with 30 mL of 0.1M potassium
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Lethal Injection: A study of influenza vaccines Every fall season we hear the question; did you get your flu shot yet? It is supposed to protect you from that nasty flu virus that circulates our communities during the fall and winter months. But‚ did you know that in 2011 the Centers for Disease Control (CDC) Adverse Event Reporting Systems Website (AERS) reported 51 deaths caused by the flu vaccine in the United States (U.S.) (CDC‚2012). According to National Vaccine Information Center (NVIC)‚
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tissue using a variety of various. Analytical methods such as activity and protein assay were employed to determine the presence and purity of LDH. The cells were initially disrupted and proteins were solubilized. LDH was purified from the ammonium sulfate precipitated protein mixture by affinity chromatography and its activity was studied by spectrophotometric determination of NADH at 340 nm. From Pierce BCA assay of crude homogenate‚ initial protein concentration was shown to be 100 mg/ml. The final
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* stopwatch * 1.00 M Copper II Sulfate * Scale * Scoop * Thermometer * Weighing plastic container Method/Procedure 1. In the lid for the foam cup make a hole in the center to fit the thermometer. 2. Accurately pipette 20.00 cm3 of 1.00 mol dm-3 CuSO4 solution into another foam cup. 3. Weigh about 4 grams zinc powder in a weighing plastic container. 4. Use the thermometer to record the temperature of the Copper II Sulfate solution accurately every 30 seconds
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The purpose of this lab was to find out the reaction of iron nails and CuSO4‚ copper sulfate solution. Before starting the experiment‚ there were two possible outcomes of the reactions. CuSO4 + Fe → FeSO4 + Cu or 3CuSo4 + 2Fe → Fe2(SO4)3 + 3Cu. The ion chart showed that iron can only make two charges‚ +2 and +3. As the liquid evaporated‚ the weight changed because the liquid added to the nail’s weight. In a real world situation‚ scientists can use ratios to determine how much of a substance that
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that the implements you use while making or using this ink are not made of steel. You will require tannic acid‚ distilled water (wine or vinegar can be substituted)‚ galls‚ solid gum arabic‚ and iron sulfate. The quantities required are 35 grams of tannic acid‚ 0.5 oz of gum arabic‚ 21 oz of iron sulfate‚ 8 oz of distilled water and galls. These can be gathered from woody areas where they can be found as circular growths on twigs or leaves typically around insect larvae on the tree or plant; tannic
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Basic Solubility Rules: A. Nitrates: All nitrate salts are soluble. B. Alkali metals: The salts of lithium‚ sodium‚ potassium‚ rubidium‚ and cesium are generally very soluble. C. Ammonium salts: Almost all ammonium salts are soluble. D. Sulfates: The sulfates of most common elements are soluble‚ except those of calcium‚ strontium‚ barium‚ and lead (II) ions. © 2010 Hands On Labs‚ Inc. LabPaq CK-1 103 E. Hydroxides: Most of the hydroxides are insoluble‚ except those of the alkali metals and barium;
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