precipitate and calculate the percent yield. Materials: Balance 0.70 M sodium carbonate solution‚ Na2CO3(aq) Graduated cylinder 0.50 M calcium chloride solution‚ CaCl2(aq) Beaker (250 mL) Wash Bottle (distilled H2O) Filter paper Funnel Iron ring Ring stand Procedure: Part I: The Precipitation Reaction (Day 1) 1. Obtain two clean‚ dry 25 mL graduated cylinders and one 250 mL beaker. 2. In one of the graduated cylinders‚ measure 25 mL of the Na2CO3 solution. In the
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static for relatively long periods of time with no side effects. Transferring flies from one vial to another is done by placing a funnel in the top of a new vial containing madia‚ then gently tapping the old vial so the flies fall to the bottom of the vial. Once the flies are the bottom of the vial remove the plug off and invert the vial into the prepared vial with funnel.
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Synthesis of Banana Flavor CHEMISTRY 200L EXPT 02 PAGE 01 - 11 Gerome B. Vallejos*‚ Ellis Mika C. Trino‚ Jahn Camille B. Valdez‚ Ariza Yamashita Department of Biological Sciences‚ College of Science Group 11 Corresponding author: gerome_911@yahoo.com Abstract The purpose of this experiment was to synthesize isopentyl acetate via Fischer esterification reaction between acetic anhydride and isoamyl alcohol‚ using concentrated sulfuric acid as a catalyst. This reaction is characterized by the combining
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Abstract: The goal of this experiment was to synthesize aspirin. In this experiment aspirin‚ also known as acetylsalicylic acid‚ was synthesized from salicylic acid and acetic anhydride. In the reaction the hydroxyl group on the benzene ring in salicylic acid reacted with acetic anhydride to form an ester functional group. This method of forming acetylsalicylic acid is an esterification reaction. Since this esterification reaction is not spontaneous‚ sulfuric acid was used as a catalyst to initiate
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OBSERVATIONS (15 points) INSERT THE FOLLOWING DIGITAL PHOTOGRAPHS OF YOURSELF : (5 points) * Measuring the CaCl2 * Stirring the reaction mixture * Folding the filter paper * Pouring the reaction mixture into the filter paper in the funnel * Placing the product on the paper towels to dry Experimental Step | Observations | Mass of CaCl2•2 H2O used (grams) | | Mass of Na2CO3 used (grams) | | Net mass of mixture‚ grams | | Appearance of mixture when the reactants are
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collection graduated cylinder placed in an ice bath. The mixture was distilled and combined with the hood partners’ distilled mixture. The distillate was placed in a separatory funnel with 10 mL of distilled water. Once separated‚ the distillate was added to the funnel again with 9 M sulfuric acid. The organic layer was still in the funnel after separation‚ as distilled water was added to the solution and then 10 mL of a saturated solution of sodium bicarbonate. The organic solution was dried with anhydrous
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allow impurities to dissolve. Therefore‚ when selecting a solvent it is important that it does not cause a chemical or flammable reaction to the substance. Then‚ we continue with the process until the solution is ready to be filtered using the Buchner funnel. During filtration the pure substance will completely separate from the impure substances completing our experiment. Procedures As stated above‚ first choose a solvent‚ for this particular experiment we will be using solvent H2O. using a hot plate
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more‚ you can easily see dry black splotches on the ground. They say that letting sputum staying in mouths is so uncomfortable‚ they must spit immediately. Out of frustration‚ government started to add small funnels on trash cans so people could spit in them. Ironically‚ even with those funnels‚ a lot of people still ignore them and keep spit on the ground. Spitting on the ground has become a habit! However‚ even disgusting Chinese do exist‚ China does have good things. Not writing them would
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Variable: The volume of reactants added Equipment: 2 100 ml beaker 2 measuring cylinders 10 ml of 0.1 molL-1 HCL(aq)‚ NAOH(aq) 20 ml of 0.1 molL-1H2SO4(aq)‚ CuSO4(aq) 30 ml of 0.1 molL-1 Ba(NO3)2(aq) Universal indicator Filter Paper Funnel 4 test tubes Reaction A- Method: 1) Measure 10 ml of 0.1 molL-1 of Hydrochloric Acid using a measuring cylinder. 2) Measure 10 ml of 0.1 molL-1 of Sodium Hydroxide solution using another measuring cylinder. 3) Pour the 2 solutions
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Rinsed the buret with two 5-mL portions of the NaOH solution. Discard the washings. Observed the markings on the buret. The top is marked 0.0-mL and the bottom 50-mL. Place a small funnel in the top of the buret and slowly pour the NaOH solution into the funnel. NaOH solution reaches the top line‚ lift the funnel and allow the solution to fill top line. Using a small beaker‚ slowly open the stopcock and drain NaOH solution untilthe meniscus of the NaOH solution is at the 0.00-mL line or below
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