students are using aspirators on same water line‚ because of the possible pressure fluctuations. CHEMICALS: Impure acetanilide‚ charcoal‚ water. EQUIPMENTS: Reflux condenser apparatus‚ 250 mL round bottomed flask‚ Hirsch funnel and filter flask. PROCEDURE: 1. Take a 50-mL round-bottomed flask and a small condenser and set up a reflux apparatus. Arrange a ceramic fibre-centered wire gauze on an iron ring such that it remains two inches above the burner. Position the clamps
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Carbonate to react with Sulphuric Acid to get Copper Sulphate. EQUIPMENT USED: o 5 Grams of Carbon Carbonate o Weighing Boat‚ Spatula & Scales o 25 cm³ Sulphuric Acid o Beaker o Tripod and Gauze o Bunsen burner‚ Splint and Matches o Filter Funnel and Filter Paper o Conical Flask o Glass Dish RISK ASSESSMENT: o Sulphuric Acid – Corrosive o Safety Glasses and Lab Coats to be worn o Any Spillage‚ dilute with water and clear IMMEDIATELY METHOD: o Weigh out approximately 5 grams of
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4. Add crucible contents to a beaker then add 200 mL water and 125 mL of solution and stir. 5. Position filter paper in the funnel‚ drain water into another beaker. 6. Transfer the precipitated material to the flask‚ allow the funnel to drain. 7. Use a microspatula to school the material and set in the drying oven‚ allow it to cool. 8. Weigh and record the mass of the filter paper‚ repeat until the mass does not change. Pre Lab Questions: 1. 2. 3. 4. 5. Data Tables:
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- INFORMATION FOR GRAVIMETRIC ANALYSIS (THEORY SECTION) http://www.dartmouth.edu/~chemlab/techniques/vfiltration.html - INFORMATION ON SUCTION FILTRATION (THEORY SECTION) http://www.laboratoryequipmentworld.com/filtering-flasks.html- THE USE OF A FILTER FLASK (THEORY SECTION) http://en.wikipedia.org/wiki/Gravimetric_analysis - COMPARING RESULTS AND PROCEDURES WITH INTERNET SOURCES (DISCUSSION SECTION)
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solution. After the basic solution is hydrated the process is then followed by complete dehydration to give solid iron oxide. Methods and Materials: Needed in the experiment was; * Crucibles‚ Metal rings‚ Wire triangles‚ Burners‚ Funnels‚ Filter Paper‚ Beakers‚ Glass rod‚ Diluted ammonium hydroxide solution‚ Nitric acid solution‚ Silver nitrate solution‚ NH4NO3 solution‚ Distilled water. Below are some methods used in experiment. fig.1 fig.2 Experimental Procedure: This experiment
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engine oil‚ you’ll need a jack and axle stance or a ramp to elevate your vehicle‚ as well as a set of wheel chocks spanner or socket ratchet torque wrench‚ a suitably sized drain pan protective gloves‚ funnel‚ oil filter wrench‚ rags‚ and of course your new engine oil and a new filter.
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Introduction The aim of this experiment is to see the effect of different Pectinase concentrations have on the production on apple juice. Pectinase is an enzyme‚ which breaks down pectin‚ a polysaccharide found in plant cell walls. This enzyme is mainly commercially used to speed up the process of fruit juice production as the cell walls of plants are broken down more quickly. Therefore by changing the Pectinase concentrations‚ the results may show the effects it may have on how much apple juice
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mass of iron fillings: Square piece of paper: 0.7g Paper and Iron fillings: 2.9g 2.9g – 0.7g = 2.2g Net mass of sand: Weighing dish and sand: 1.9g Mass of weighing dish: 0.6g 1.9g – 0.6g = 1.3g Net mass of benzoic acid: Filter paper: 1.0g Filter Paper and Benzoic acid 2.1g 2.1g – 1.0g = 1.1g Net mass of salt: Salt + cup: 6.2g Cup: 4.7g 6.2g – 4.7g = 1.5g Total net mass of samples collected: 2.2g + 1.3g + 1.5g +1.1g = 6.1g Percentage of total mixture: (Calculated
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Gravimetric Analysis: The Determination of Phosphorus in Plant Food Gravimetric analysis is a quantitative (i.e. how much?) method of classical analysis. The element to be determined is isolated in a solid compound of known identity and definite composition. The mass of the element that was present in the original sample can be determined from the mass of this compound. Plant foods contain three essential nutrients that are not readily available from soils. These are soluble compounds
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CHAPTER 7 1. The ability of a receiver to choose a desired signal frequency while rejecting closely adjacent signal frequencies is known as selectivity. 2. Decreasing the Q of a resonant circuit causes its bandwidth to increase. 3. Good selectivity usually means narrow bandwidth. 4. True. A tuned circuit can provide voltage gain. 5. Cascading tuned circuits cause the selectivity to increase. 6. If the selectivity of a tuned circuit is too sharp‚ the sidebands of the received signal
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