Recrystallization Estopace‚ Edgie1‚ Polintan‚ Clarisse K. Professor Edgie Estopace‚ School of Chemical Engineering‚ Chemistry and Biotechnology‚ Mapua Institute of Technology; Clarisse Polintan‚ CHM145L/A21‚ School of Chemical Engineering‚ Chemistry and Biotechnology‚ Mapua Institute of Technology ABSTRACT This experiment is all about identifying the appropriate solvent for recrystallization and technique and to use the recrystallization technique in purifying a solid sample. Most organic
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Acid-Base Titrations A Titration of Potassium Hydroxide Phthalate and Sodium Hydroxide Hanna Piper Department of Chemistry‚ SUNY College at Brockport‚ Brockport‚ NY 14420 Chemistry 205.06 Abstract Titrations are used to find the molarity of an unknown solution. A titration begins with an analyte and titrant being used to measure the unknown molarity of the analyte. In the following experiment‚ sodium hydroxide was used as the titrant and potassium hydroxide phthalate was used as the
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Abstract: The purpose of this lab is to prepare phenylmagnesium bromide‚ a Grignard reagent‚ and react it with benzophenone to give triphenylmethanol. Once made‚ the Grignard reagent will do a nucleophilic attack on the carbonyl carbon of the ketone‚ benzophenone. The result is an alkoxide that is then protonated to give the alcohol‚ triphenylmethanol. The purity of the final product will then be considered by melting point and IR spectroscopy. Final purified triphenylmethanol weighed 8.02 grams
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Title Soda Ash: Great for the economy but detrimental to the body; So why is it involved in everyday life? Abstract Sodium carbonate‚ Na₂CO₃‚ commonly known as soda ash is used in the manufacturing of many economically important products such as the manufacturing of glass‚ chemicals‚ paper and detergents. Since sodium carbonate has a strong base‚ it is commonly used to neutralize acidic effects. Soda ash has a high pH in concentrated solutions and can irritate the eyes and skin as well
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RECRYSTALLIZATION OF ACETANILIDE ABSTRACT Recrystallization is the primary method for purifying solid organic compounds through the differences in solubility at different temperatures. In this experiment‚ a suitable solvent was first determined. Acetanilide was produced by acetylation of aniline with acetic anhydride. The crude acetanilide was dissolved in a solvent in a heating water bath. The hot solution was filtered and the filtrate‚ cooled slowly in an ice bath as crystals started forming
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placed in a commercial blender with about 200 mL of water and ground thoroughly for 5-10 minutes‚ or until all of the leaves are blended. 2. Split the extract into two and filter each using a large Buchner funnel into a 500-mL filter flask. Use additional filter flasks and Buchner funnels as necessary and change the filter paper in the funnel when filtration slows due to clogging. You may need to add excess water to remove all of the spinach remnants from the blender. 3. Meanwhile‚ prepare 375 mL
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standardized solution Perform the right titration techniques II. Materials A. Reagents Sodium hydroxide (NaOH) pellets Potassium acid phthalate (HKC8H4O4) Phenolphthalein Soft drinks samples B. Apparatus 250-ml beaker 250-ml Erlenmeyer flask 100-ml volumetric flask 50-ml buret 10-ml pipet buret holder Stirring rod triple beam balance Bunsen burner Iron stand and ring wire gauze III. Schematic diagram of the procedure IV. Data and Observations Table 1.1. Preparation of the Sodium hydroxide
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Mechanism: Experimental Procedure: (as per lab handout) 1) Add 6 mL of 2-methylcyclohexanol‚ 5 mL of 85% phosphoric acid and a boiling stone to a 25 mL round bottom flask. 2) Set up the flask and also start setting up the distillation
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the graduated cylinder was clamped upside down in the beaker. A rubber stopper with two holes in it was then placed in a 125 mL Erlenmeyer flask. A rubber tube was then inserted into one of the holes of the flask‚ with the other end in the upside down beaker. 20 mL of air was then pumped into the graduated cylinder. About 20 mL of 6 M HCL was then added to the flask. A nail was then inserted into the second hole in the stopper‚ followed by a glass plug. Immediately after the reaction [Zn(s)
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test tube. Record the resultant color for the acid and base. Repeat for the other 4 Acid - Base Indicators PART 2 - ACID/BASE TITRATION PROCEDURE Step 1: Obtain acid‚ in a 100 ml Erlenmeyer flask add 35 ml of an Unknown HCl solution. Step 2: Add an indicator to the acid‚ select the flask and add 2 drops of phenolphthalein indicator. The indicator menu is available under the chemicals main menu (ChemicalsIndicators) or the context menu. Step 3: Fill buret with NaOH‚ obtain a
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