Unit 4B Task 2 Title Recrystallization of benzoic Acid Aim Equipment 1. Erlenmeyer flask 2. Graduated cylinder 3. Hot plate 4. Small beaker 5. Ice bath (if necessary) 6. Filter paper 7. Buchner funnel 8. Spatula 9. Weighing machine Method 1. Weighing paper was used to weigh approximately 1.00g of ‘impure Benzoic acid to produce re crystallization’. 2. Moved it to a 125ml Erlenmeyer flask. 3. Poured approximately 20ml of distilled water by using a graduated cylinder
Premium Laboratory glassware Erlenmeyer flask Water
Alvarenga Lab Partner: Keren Appiahene Mussie Gide 10 September 2016 Experiment 2: Acid- Base Extraction Separation of an Organic Acid‚ a Base and a Neutral Compound Introduction: The extraction technique is often used in the organic lab to separate organic compounds from mixtures. One type of an extraction technique is the acid-base extraction‚ which is used to separate organic compounds from a mixture based on their acid-base properties.1 There are certain principles that must be taken into account
Premium Chemistry Acid
Unit 4 Assessment 2-Benzoic Acid Synthesis Synthesis and Investigation of Benzoic Acid Our aims: Create benzoic acid using benzaldehyde and hydrogen peroxide. Then remove some impurities from the benzoic acid crystals. Apparatus: Titration Pipette (25 cm3) Burette (50 cm3) Retort stand Clamp Conical flask (250 cm3) Volumetric flask (250 cm3) and stopper White tile Beakers (250 cm3) Dropping pipette Filter funnel Deionised water Phenolphthalein indicator Volumetric flask
Premium Chemistry Water Sodium hydroxide
Acid-Base Extraction: Separation of an Organic Acid‚ Base and a Neural Compound Introduction/Background Acid base extraction is a widely used commercial method in separating acids‚ bases and neutral compounds. This is concept is based on several physical properties of the compounds‚ such as boiling point‚ melting points and solubility. The different solubility properties of the protonated and non-protonated forms of these compounds depend on the functional groups present‚ such
Free Acid Chemistry Carboxylic acid
Benzoate from Benzoic Acid October 28‚ 2010 Abstract: This experiment was conducted to synthesize methyl benzoate from benzoic acid and methanol by using the Fischer esterification method. Methanol (12.5ml) and Benzoic acid (4.9 grams) are heated together in the presence of concentrated sulfuric acid (1.5ml) until equilibrium is achieved. A reflux apparatus is set up for 1 hour to carry out the reaction at the boiling point of the solvent (Methanol‚ 2.5ml). Then‚ separation though an extraction
Premium Distillation Benzene Oxygen
TWO-BASE EXTRACTION OF BENZOIC ACID‚ 2-NAPHTHOL‚ AND NAPHTHALENE FROM UNKNOWN SAMPLE # 131 Douglas G. Balmer (T.A. Mike Hall) Dr. Dailey Submitted 11 July 2007 Introduction: The purpose of this experiment was to separate a sample of benzoic acid‚ 2- naphthol‚ and naphthalene of unknown proportions using a two-base extraction method. The three components of the mixture will react differently to sodium bicarbonate and sodium hydroxide because each of the bases’ conjugate acids has a different pKa
Premium Sodium hydroxide Hydrochloric acid PH
Recrystallization and Melting Points Determinantion of Benzoic Acid Abstract In experiment 2‚ recrystallization was used to purify the crude benzoic acid extracted from a mixture during experiment 1. Then a percent recovery for this recrystallization process was calculated. In experiment 3‚ the melting point ranges of the crude and purified benzoic acid were both determined by using Melt Temp Apparatus. Introduction Recrystallization is a purification technique for non-volatile solids. The general idea
Premium Chemistry Liquid Water
Extraction of R’-NH2 For both of the organic acid and organic base extraction‚ the addition of the respective inorganic acid or inorganic base (HCl or NaOH) to the three-component mixture caused an immiscible appearance of the solution in the separatory funnel. By briskly shaking the separatory funnel with the mixed components created a build up of pressure which was released through the stopcock forming small disappearing bubbles within the tip of the separatory funnel. Once the funnel was placed
Free Acid Chemistry Laboratory glassware
Separation by difference in particle size: Sieving: - Is a way pf separating mixtures of solids‚ or solids and liquids with different sized particles - The mixture is poured through a sieve and the particles smaller than the sieve pass through while the larger particles are trapped by the sieve - The are commonly used for cooking - E.g. a mixture of rice and water is poured through a sieve to capture rice and remove the water Filtration - Is a technique commonly used for mixtures of solids and liquid
Premium Distillation Water Evaporation
De-esterification for Synthesis of Benzoic Acid BATCH REACTOR Shane Bulk Chris Crosley David McGuire Max Skula Yunjing Song Shriram Sundarraj Nelson Zhou 155:416 Process Laboratory II Professor Jerry Sheinbeim January 28 – February 28‚ 2014 ABSTRACT The observed reaction that took place in this experiment was the de-esterification of ethyl benzoate to form benzoic acid. This experiment was used to determine the rate constant k of the synthesis of benzoic acid at different temperatures
Premium Chemical kinetics Sodium hydroxide Ethanol