(antacid tablets) Standardization of NaOH Materials: -Buret -250 mL Erlenmeyer flask -0.1 M NaOH -0.8 g KHP -Water -Three 150 mL beakers -magnetic stirrer A buret was rinsed with water and then with a small amount of the NaOH solution. Then the buret was filled with NaOH. The initial volume was read and recorded and the buret was labeled as BASE. Then approximately 0.8 g of KHP was placed in the flask. 100 mL of water was added and was swirled until dissolved. Three drops of
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Experiment 2: Isolation of Eugenol from Cloves Background; Readings on Vapor pressure‚ Raoult’s Law from TRO: A mixture of the essential oils‚ eugenol and acetyleugenol‚ will be steam distilled from cloves. These compounds are isolated from aqueous distillate by extraction into dichloromethane. The dichloromethane solution is shaken with aqueous sodium hydroxide‚ which will react with eugenol‚ to yield the sodium salt of eugenol in the basic
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cork. 5. The stop cork was closed‚ shaked and again vented. The mixture was held stand to allow the layers to separate. 6. The top layer was the ether layer and the bottom layer was the aqueous layer. 7. The aqueous layer was drained into an erlenmeyer flask
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mL * Manganese sulfate solution‚ MnSO4∙ H2O‚ 1.0 M‚ 50 mL * Oxalic acid solution‚ H2C2O4‚ 0.25 M‚ 60 mL * Potassium permanganate solution‚ KMnO4‚ approx. 0.02 M‚ 100 mL * Sulfuric acid solution‚ H2SO4‚ 6 M‚ 50 mL Materials: * Buret‚ 50-mL * Erlenmeyer flasks‚ 250-mL‚ 3 * Hot plate * Thermometer * Volumetric pipet‚ 10-mL * Volumetric pipet‚ 25-mL *
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volumetric flask using a volumetric pipette. The volumetric flask was then filled to the mark with distilled water. The flask was covered with Parafilm and inverted to mix. The next part of the experiment was to determine the Vitamin C in a solution of known concentration. Observations of the Vitamin C sample and the amount found on the label was recorded. A tared piece of weighing paper was used to weigh 0.27 g of Vitamin C. The Vitamin C was then transferred to a clean 50 mL volumetric flask. The flask
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reagent can easily react with water‚ all glassware including the 25 ml round bottom flask‚ magnetic stir bar‚ 3 and 5 ml conical vial‚ 50 mL Erlenmeyer flask‚ claisen adapter‚ drying tube and 5 glass pasteur pipets were first added to a 250mL beaker and placed in the oven for 30 minutes. After the completion of the thirty minutes‚ 0.150 g of shiny magnesium turnings and a stir bar was first added to the round bottom flask and the claisen adapter along with the drying tube packed with calcium chloride
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Fermentation of a Carbohydrate: Ethanol from Sucrose Abstract The purpose of this lab was to demonstrate the fermentation process of ethanol from the substrate sucrose. To make ethanol from sucrose two enzymes invertase and zymase were used. Vacuum filtration and fractional distillation were performed to get a more concentrated solution. The density of ethanol was .825 g/mL with a percent composition of 85% pure
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50 mL of concentrated nitric acid was measured in a graduated cylinder‚ 20 mL of which was transferred to the 80mL test tube. This test tube was placed in the Erlenmeyer flask with enough water covering at least 2 cm of the test tube. The coiled copper wire from earlier was cautiously placed into the test tube. The fume hood was lowered to prevent any inhalation of the toxic gas emitted from the exothermic reaction
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the rate of the oxidation/reduction reaction because it occurs much faster but is still dependent upon the other reaction. To accomplish this‚ two mixtures were prepared in separate Erlenmeyer flasks. In the 250 ml flask .010M potassium iodide‚ .0010M Sodium thiosulfate and distilled water was prepared. A 125 ml flask was also prepared with a mixture of .040M potassium bromate‚ hydro chloric acid and
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A series of 250ml Erlenmeyer flasks containing 100ml of M1 medium (0.2g NaNO3‚ 0.05g KCl‚ 0.05g MgSO4.7H2O‚ 1g glucose‚ 0.001g FeCl3‚ 0.02 g BaCl2‚ 0.05g CaCl2) at pH 6.8 with an addition of increasing concentration of deltamethrin was prepared. 1ml of 108 fungal spore suspension cultures was added into each of these flasks. These flasks were incubated at 280± 20C on the shaker at 120rpm for 7 days. Mycelium growth was observed in each of these flasks. The mycelium growth was measured
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