20 milliliters and 40 milliliters of the unknown HCl solution. 4. Record volume. 5. The amount of unknown HCl is then added to the 100-milliliter Erlenmeyer flask. 6. Add two drops of the indicator‚ phenolphthalein‚ to the acid in the flask. 7. Using the slider on the right hand side‚ add NaOH to the HCl in the Erlenmeyer flask (This action is known astitrate). Add the indicator until the color of the indicator turns a light shade of pink. 8. Record the volume. 9. If you
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the decomposition of hydrogen peroxide with two different sizes of potato cubes and one pureed. The same volume of potato will be used‚ only the geometry of the potato will be modified. Materials: 450 ml Hydrogen Peroxide Water 2 Erlenmeyer flasks 1 Stopper w/hole Surgical tube (18 inches) 150mL measuring beaker Potato (Have each potato skinned and cut into 4’x4’ cubes) Stop watch Student Instructions for experimental setup: Organize into groups of 4 or 5 students
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120 g of camphor ‚ the I added 1.0 ml of methanol in a 10-ml Erlenmeyer flask. I stirred with a glass stirring rod until the camphor has dissolved. Then I added 0.10 g of sodium borohydride‚ after I started to boil the contents of the flask on a warm hot plate for 7 minutes then I left the reaction to calm. I added 3.5ml of ice-cold water‚ then I collected the white solid by filtering ‚ I transferred the solid to a 10-ml Erlenmeyer flask then I added 4ml of methylene chloride to dissolve the product
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Layer water on top of the resin with minimal disturance to your sample solution (about 30 mL of water is needed to wash the sample through the column). 9. Collect the sample in an Erlenmeyer flask. a. Replace waste beaker with a clean Erlenmeyer flask. b. Open screw clamp and collect the effluent in the Erlenmeyer flask. c. Control the flow rate to prevent the sample from becoming too spread out on the column‚ and adjust the flow so that the effluent is dripping out at the rate of one or two
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glassware apparatus for the reaction was set up. 3.861-grams of isoborneol‚ 2.21-mL of glacial acetic acid‚ and 4.39-mL of 6% NaOCl solution were mixed in a 125-mL Erlenmeyer flask. Another 35-mL of 6% NaOCl solution was added to a separatory funnel and supported over the flask. The NaOCl in the sep funnel was slowly added into the Erlenmeyer flask with vigorous swirling‚ approximately 2-mL every 30 seconds until all the NaOCl from the sep funnel had been added. The temperature of the reaction mixture
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percentage actually obtained by chromatography. Procedure: A massed sample of 1.012g of tomato paste was placed in a 125mL Erlenmeyer flask. To the flask‚ 5mL of 50:50 hexane-acetone was added into the flask. After the 50:50 addition the flask was capped and shaken. After the settling of the sediments‚ the liquid portion was pipetted in a 50mL Erlenmeyer flask. The process of separating the liquid from the solid was repeated for a total of four times. To the extracted liquid‚ 5mL of NaCl
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to dissolve your impure solid…but then you a squirrel ran by and you decided to chase it. When you got refocused and returned to your experiment‚ you realized that you’d left your Erlenmeyer flask containing your recrystallization solution on the hot plate for too long. (1) How did you know that you’d left your flask on the hot plate for too long? and (2) how can you correct your mistake? 1- 3. How did your % recovery for the Craig tube recrystallization of salicylic acid compare
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Title: The Green Oxidation of Borneol to Camphor Date Conducted: February 8‚ 2012 April 27‚ 2012 Abstract: The goal of this experiment was to perform a Green Oxidation of Borneol to Camphor‚ without the use of Chromium synthesis since it is toxic to the environment. Reagent Table: |Chemical Name |Amount used |Molecular weight |Concentration |Density g/mL |BP °C |MP °C |Chemical Formula
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below. Chemical Reactions: a.) HCl and Na2CO3 = 2NaCl + CO2 + H2O b.) KHP and NaOH = KNaP + H2O Experimental Procedure: 1. Get an Erlenmeyer flask (250 mL) and add 100 mL of distilled water to it. 2. Weigh .15 of NaCO2 and add it to the distilled H2O. 3. Now add .5-1 mL of bromocresol to the flask. 4. Fill up the buret with HCl 5. Let the buret drip into the flask until the color turns green then stop buret. 6. Once it is a green color place it on a burner to boil it‚ add stir bar so it keeps the
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Jolyne Piet CHM-221L-02 Lab #2: Experimental Design Isolation of Sucrose: 3.01 g Panacetin were weighed in a 125-mL Erlenmeyer flask‚ and 51mL dichloromethane were added to partially dissolve the Panacetin. The insoluble portion was gravity filtered and air dried to yield 0.45 g of sucrose (15.0 % of original Panacetin). Isolation of Aspirin: The organic filtrate was extracted through a separatory funnel with 32 mL 5% sodium bicarbonate to produce an aqueous layer and a dichloromethane layer
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