SOLUTION PREPARATION AND STANDARDIZATION A.G.R. SUAREZ INSTITUTE OF BIOLOGY‚ COLLEGE OF SCIENCE UNIVERSITY OF THE PHILIPPINES‚ DILIMAN‚ QUEZON CITY 1101‚ PHILIPPINES DATE SUBMITTED: 5 DECEMBER 2012 DATE PERFORMED: 23 NOVEMBER 2012 INTRODUCTION All chemists must know how to prepare solutions of varying concentrations because many reactions in quantitative analysis take place in an aqueous medium. In this experiment‚ solutions were made using 2 methods. The first method used
Premium Titration Erlenmeyer flask
Ryan Tsinigine Partner: Yuchen Title: How Much Gas CHM 151 LL Wednesday: 11:15-2:00 Instructor: Dr. Leary May 1‚ 2013 Introduction In this project we will choose a solid reagent‚ Mg‚ CaCO3‚ or Na2CO3‚ to react with a hydrochloric acid solution‚ HCl. We are going to measure the amount of gaseous product obtained from the amount of gaseous product obtained from reaction. Then compare to theoretical yield‚ Percent Yield=Actual Yield of Gas/ Theoretical Yield of Gas×100‚ based on stoichiometric
Premium Ideal gas law Pressure Gas
Experiment 4 SOLUTION STOICHIOMETRY ACID-BASE TITRATIONS Determination of the Percent Acetic Acid in Vinegar Objectives: (1) To introduce and use the concept of solution stoichiometry (2) To specifically use solution stoichiometry to determine the percent of acetic acid in vinegar. (3) To prepare a standard solution by the method of titration. Consider the following balanced chemical equations: (1) HCl + NaOH ------> NaCl + HOH (2) H2SO4
Premium Mole Titration Acetic acid
in a tiny round bottom flask and add two volumes of anhydrous hydrazine. An alternate procedure uses a sealed tube in which the reagents are heated at 112 C. The mixture is refluxed (or heated) for 30 minutes. Add 1.5 volumes of H2O and boil 15 minutes. On cooling in the refrigerator‚ isolysergic acid hydrazide is crystallised. Step II. Use Red light Chill all reagents and have ice handy. Dissolve 2.82 g hydrazine rapidly in 100 ml 0.1 N ice-cold
Premium Solvent Ammonia
Mona Vaidya April 8‚ 2014 Professor Diaz Chem 317 Section: 20711 Lab Experiment: Nitration of Bromobenzene Introduction: The chemical reaction of nitration consists of a nitro group being added to or substituted in a molecule. Nitration can basically be carried out by a mixture of concentrated nitric acid and sulfuric acid; this mixture is useful to obtain the active nitronium ion. Electrophilic aromatic substitution is a method used when a functional group is needed to be substituted on
Premium Nitration Electrophilic aromatic substitution Benzene
Grignard Synthesis of Triphenylmethanol Aim The aim of this experiment was to prepared Grignard reagent (phenylmagnesium bromide) from bromobenzene and magnesium‚ to use the reagent prepared to synthesise a tertiary alcohol (triphenylmethanol) by reacting reagent and ester (methyl benzoate)‚ and the product formed is analyse by infrared spectroscopy (IR)‚ melting point‚ thin layer chromatography (TLC)‚ gas chromatography mass spectrum (GCMS) and finally Nuclear Magnetic Resonance spectroscopy. Introduction
Premium Nucleophile Magnesium Alcohol
1.0 Title Determination of Protein Content Using Kjedahl and Titration 2.0 Introduction Proteins are polymers. They are the source of dietary amino acids and are used for growth and maintenance of living systems. They are costlier sources of energy compared to carbohydrates and fats and hence the human body utilizes proteins mainly for biosynthesis rather than as an energy source‚ though the energy yield is 5 kcal/g of protein. Twenty different types of amino acids occur naturally in proteins
Premium Sulfuric acid Ammonia Nitrogen
by acetylation of aniline with acetic anhydride. The crude acetanilide was dissolved in a solvent in a heated water bath. The solution was cooled slowly in an ice bath as crystals form out. As the compound crystallizes from the solution‚ the limiting reagent Aniline and the percent yield of 96% was obtained. Introduction: This experiment involves four functional groups common in organic chemistry. The substrate (reactants) which are Aniline and Acetic anhydride are both liquids and one of the
Premium Amine Oxygen Acetic acid
the highest/longest distance in cm. Also to experimentally determine the % NaHCO3 in the tablet using the information from the highest/longest distance. Calculate the error and % error of NaHCO3 in an Alka-Seltzer tablet and to determine the limiting reagent for the highest/longest distance traveled. Alka-Seltzer tablets were first obtained. Vinegar‚ a 250-mL beaker‚ and a 50-mL (or 10-mL) graduated cylinder was given from the instructor. After the experiment‚ a graph of percent by mass of the reacted
Free Acetic acid Sodium bicarbonate Vinegar
Objective: The purpose of this experiment was to prepare the Grignard reagent methylmagnesium iodide and react it with benzoin to form the 3o alcohol 1‚2-diphenyl-1‚2-propanediol‚ through an addition reaction pathway. Introduction: Grignard reagents are alkyl or aryl-magnesium halides that act as the nucleophile in Grignard reactions‚ where ketones are reacted with the reagent‚ then treated with acid to produce an alcohol. In the case of this experiment‚ methylmagnesium iodide was created
Premium Magnesium Diethyl ether Methane