equation: Na2CO3 + 2HCl → 2NaCl + H2O + CO2 Materials / Apparatus: 1) 8.00g of sodium carbonate‚ 2) 30mL of hydrochloric acid (6molL-1) 3) 100mL of hydrochloric acid (6molL-1) 4) 100mL conical flask‚ 5) 150mL glass beaker 6) 50mL glass beaker 7) Glass funnel‚ 8) Digital scales‚ 9) Metal spatula and a 10) Disposable plastic pipette. Procedure: (for 2molL-1) 1) Weigh an empty conical flask and record its weight. 2) Keep empty conical flask on digital scale‚ and with a metal
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This will ensure that the solvent and coffee don’t mix together‚ and will instead form two separate layers that will allow for extraction in the separatory funnels. Dichloromethane is the ideal solvent because it is immiscible with the water‚ and will allow caffeine to be dissolved in it2. The filtration that happens in the separatory funnels isolates the caffeine and the dichloromethane. The magnesium sulfate helps dry the combined layers of caffeine and dichloromethane‚ and then the evaporation
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amount number of mL of NaOH needed to react with the sulphate solution. Then add 5 mL at a time NaOH until Cu(OH)2 precipitate does not form. Record the correct number off mL which forms to NaOH solution. Fold the filter paper and stick inside the funnel‚ and pour the solution of copper (II) hydroxide through the filter. The purpose of this experiment is to determine the yield of copper (II) sulphate reaction. Reagent preparation: 0.5 mol/L = mol/0.1L 0.5 (0.1L)=mol mol = 0.05 0.05
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Aim To prepare a sample of cuprammonium rayon threads from filter paper Apparatus Required a) Conical flask (preferably 250 ml) b) Funnel c) Glass rod d) Beaker (preferably 250 ml) e) Water bath f) Filter paper (Whatman paper or ordinary filter paper sheets. Preferably‚ Whatman) Chemicals Required a) CuSO4 b) NaOH solution c) Liquor ammonia solution d) Dilute H2SO4 e) Whatman Paper f) Distilled H2O Background Rayon is a synthetic
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Prepare a vacuum filtration assembly using two 250-mL side-arm filter flasks‚ a 5.5-cm Buchner funnel (with a Filtervac or neoprene adapter)‚ and two lengths (each 12 in.) of vacuum tubing. [N.B. We use the second flask so between the aspirator and our filter flask so that the filtrate will not become contaminated if tap water is pulled back through the hose.] Place a piece of filter paper into the Buchner funnel so
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used a pressure tube to find out that a ping-pong ball could stand up to 90 PSI. They also said that they used a long three inch diameter tube‚ to which they put a funnel in one end and the other end into the boat that they had sealed up. They then put several ping-pong balls in the funnel at a time and put a garden hose in the funnel so that the water‚ pulled by gravity‚ would "wash" the balls down‚ filling the boat. Jamie also noted that one of Adam’s seals‚ had failed and several hundred ping-pong
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Abstract The preparation of 7.7-dichlorobicyclo [4.1.0]heptane which is also known as 7‚7-dichloronorcarane was done by reacting cyclohexene ‚ chloroform and a base( 50% aqueous sodium hydroxide) with benzyl triethylammonium chloride. The latter being a water soluble phase transfer catalyst (PTC).reaction was performed at room temperature and was distilled at atmospheric pressure. The mechanism of action of the above mentioned PTC is described in the text along with the mechanism for the addition
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Extracting NaCl from Rock Salt and assessing its purity Aim The aim of this experiment was to obtain a pure product from a solution through the processes o extraction‚ filtering and evaporation. Introduction Extraction is used when trying to separate or purify a product. For an extraction to be successful the substance used to make the solvent should readily dissolve. The substance used in this practical was rock salt. The liquid used should not react with the substance that needs extracting
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counters. Our toaster competes for space with a collection of funnels made from 2-liter plastic beverage bottles and rubber stoppers (1). Baking soda from my shelf joins citric acid from a natural foods shopping trip‚ to be molded into bath bubblers using plastic eggs left over from Easter (2). My young children view this as normal. They like to help with mom’s “chemistry experiments”‚ as I refer to them. They pour water into the funnels. They try out the bath bubblers in their evening bath. They are
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An experiment was run to determine which enzyme (pectinase‚ and cellulase or combinations of the two enzymes) maximizes juice production and would be most cost effective. The proposed hypothesis was if the enzyme‚ pectinase‚ is added to apple juice‚ then the more juice will be extracted than if cellulase were added because pectinase holds the cell wall together and if it is separated apart from each other‚ then the more juice would be able to flow out. The experimental data show that during the ten
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