Benzoic Acid Lab Report

Words: 597

Pages: 3

Open Document

Benzocaine, also known as ethyl p-aminobenzoate, is a widely used inexpensive anesthetic (1). In this experiment, a sample of impure benzoic acid is examined. The sample was believed to contain significant amounts of benzoic acid which required experimenters to use the chemical properties of benzoic acid and benzocaine to remove the benzoic acid and isolate the benzocaine in high purity and recovery (1). The benzoic acid was also to be isolated to determine the % recovery and purity of the sample. From the data collected, the percent composition of the original sample can be estimated (1). Both benzocaine and benzoic acid are highly soluble in ethyl acetate and neither is soluble in water (1). Benzoic acid is a carboxylic acid, which suggests that this compound tends to be relatively acidic (1). To remove the Hydrogen cation using NaOH solution to form sodium benzoate, because NaOH is very soluble in water, this property helped aide the separation of the sample (1). Figure 1 shows the structure of …show more content…
The sample was cleaned up using liquid-liquid extraction and acid-base chemistry. The liquid-liquid extraction and acid-base chemistry steps were used for the extraction of the sample. A separatory funnel was used for the extraction of the benzoic acid sample. The success of the separation allowed for Thin Layer Chromatography (TLC) and Infrared Spectroscopy (IR) analysis. TLC was used to separate solvents and compare the extracted samples of benzoic acid and benzocaine to a reference benzoic acid and reference benzocaine. IR was used to show the stretches and bending modes within the molecule of the extracted benzocaine and was compared to that of a reference IR Spectrum for benzocaine. The research question for this experiment was to indicate the amount of purity of the benzocaine and benzoic acid by comparing the extracted samples to reference

Raw Data Table: The Main Chemical Concepts Of The Theory Of Lab

Assigned Questions: The discussion is one of the most important parts of the entire lab report. The discussion should begin with a brief introduction covering an explanation of the theory of the experiment (not restating the procedure!!!). In this introduction, make sure to discuss the main chemical concepts of the experiment and start to transition to how these concepts apply to your specific results in the lab. (This should not take more than 1 or 2 paragraphs, the goal is to provide a “scientific”…

Words 508 - Pages 3

Essay Sample Report Separation Of A Mixture Of Solids

Sample Report: Separation of a Mixture of Solids Experiment Purpose: Procedure: 1. Separating out the Iron a. Use the digital scale to determine the mass of the weighing dish and record in the table. b. Empty the mixture of solids from the plastic bag into the weighing dish and determine the gross mass of the total mixture and weighing dish and record in the table. Compute the net mass of the mixture and record in the table. c. Spread the mixture into a very thin layer over a full sized piece…

Words 735 - Pages 3

Separation of a Mixture of Solids Essays

funnel and begin to pour the benzoic crystals and salt mixture through the filter into the second weighed paper cup. After the cup has drained into the second paper cup the student will pour 5ml of chilled distilled water through the funnel to get all of the salt out. The student will wrap the filter paper full of benzoic crystals in paper towels and place it somewhere safe until it is completely dry. After the substance is dry the student will get the net mass of the benzoic crystals be weighing the…

Words 1442 - Pages 6

Lab Report 1 Essay

Dung Mai CH 337 – Winter 2015 Lab report #1 The Purity and Purification of Solid Melting Points. Abstract: The melting point method is used to find the melting range to determine the purity of biphenyl, naphthalene, and mixture compound of this two compound. With the same method, the unknown compound will be determined base on the melting range. According the giving data, the unknown D is Succinic Acid, which has melting point at 1880C, because the unknown has the closet melting range from 1810C…

Words 1375 - Pages 6

Chem lab Essay

Lab report Introduction- An ester is “any class of often fragrant organic compounds that can be represented by the formula RCOOR′ and that are usually formed by the reaction between an acid and an alcohol with elimination of water.” We set out to create these esters on our own by combining acids like acetic acid, butyric acid, and benzoic acid with certain alcohols like ethanol, methanol, or pentanol. Each had a unique smell, which we would try to determine by smelling each. Objective- To…

Words 303 - Pages 2

Synthesis Of Copper, Nitrate And Copper (II) Hydroxide

EXPERIMENT 1: Part 1: Synthesis of Copper(II) Nitrate and Copper(II) Hydroxide Cu(s) + 4HNO3(aq) Cu(NO3)2(aq) + 2NO2(aq) + 2H2O(l) * Redox reaction Reducing reagent=Cu and Oxidizing reagent=HNO3 * Copper and 10mL of concentrated nitric acid (HNO3) * reaction carried out in the fume hood, brown gas given off * swirl the reaction mixture to remove any gases trapped in the solution * solution changed from green to blue * It is SPONTANEOUS (heat is given off)…

Words 2609 - Pages 11

Chem 1211K Lab Report Essay

Chemistry 1211K Lab Report Briana Limage Drawer #D20 Tuesday December 2, 2014 Lab Day and Time: Tuesday 2-5 Unknown # 4224034-DF14 Introduction The purpose of this semester long experiment was to determine an unknown organic acid. An organic acid is an organic compound with acidic properties. A base reacts with acids to form salts. Titrations are used to determine the concentration of unknown substances. The purpose of the KHP experiment was to determine the molarity of NaOH. HCl…

Words 1839 - Pages 8