w w w e tr .X m eP e ap UNIVERSITY OF CAMBRIDGE INTERNATIONAL EXAMINATIONS International General Certificate of Secondary Education .c rs om *2925136620* CHEMISTRY Paper 3 (Extended) 0620/33 May/June 2012 1 hour 15 minutes Candidates answer on the Question Paper. No Additional Materials are required. READ THESE INSTRUCTIONS FIRST Write your Centre number‚ candidate number and name on all the work you hand in. Write in dark blue or black pen. You may use a pencil for any diagrams‚ graphs
Premium Sodium hydroxide Sodium chloride Chlorine
MATERIALS REVOLUTION UNIT REVISION BOOKLET Vikram Mahal How To Use this Booklet: This booklet has been created by addressing all the points on the OCR B salters specification for the section‚ what’s in medicine. I advise reading through the Book‚ highlighting or underlining words written in ALL CAPITALS. I also suggest making a spider diagram or mind map to summarise key points and help the information here stick in your mind. You could also draw your own images by points on this
Premium Amine Carboxylic acid Amino acid
Esterification Reaction Zhenshu Wang (Stan) TA: Aaron League September 23‚ 2012 Purpose: The purpose of the experiment was to perform the acid-catalyzed Fischer Esterification of acetic acid and isopentyl alcohol to form isopentyl acetate‚ or banana oil‚ which is used in flavor industries. The equilibrium of the reaction was changed by adding an excess amount of acetic acid. The reaction was refluxed and product was purified by extraction and distillation. Isopentyl acetate was analyzed by infrared spectroscopy
Premium Ester Carboxylic acid Acetic acid
Full Lab Report Experiment #2: Acid-Base Titration Lab Description: Acid-Base Titration Introduction In this lab exercise we will evaluate the effectiveness of several indicators for the determination of the point of completion of a specific acid-base neutralization reaction. We will also determine the unknown concentration of the strong base NaOH by its reaction with a known amount of the weak acid‚ potassium acid phtalate (HKC8H4O4‚ abbreviated KHP). This will be accomplished using the titration
Premium PH indicator Titration PH
b. a ribosome c. a hexose sugar d. a water molecule e. a yeast cell 2. The four main families of small inorganic molecules in cells are a. salts‚ sugars‚ fatty acids‚ amino acids‚ nucleotides b. sugars‚ fatty acids‚ amino acids‚ nucleotides c. salts‚ sugars‚ water‚ fatty acids d. sugars‚ fatty acids‚ alcohols‚ nucleotides 3. In order to distinguish the layers of a cell membrane you would use an electron microscope because: a. it operates in a vacuum b. it can magnify
Premium Protein Amino acid Atom
̊) Tertiary Alcohol(3 ̊) Lucas reagent‚ a mixture of concentrated hydrochloric acid and anhydrous zinc chloride‚ can be used to differentiate the three classes of alcohols. Tertiary alcohol turns cloudy or appears in two layers almost immediately‚ secondary alcohol reacts within 5 to 10 minutes whereas primary alcohol reacts very slowly. Alcohol can be oxidised to aldehyde‚ ketone or carboxylic acid. The product formed depends on the class of alcohol used. Various oxidising agents such
Premium Alcohol Ethanol Carboxylic acid
CHAPTER : ORGANIC CHEMISTRY CONTENTS 1‚4-BENZENEDICARBOXYLIC ACID Introduction The organic compound’s group that I’ve chosen in this assignment is 1‚4-benzenedicarboxylic acid. 1‚4-benzenedicarboxylic acid and also called as Terephthalic acid containing the carboxyl group and benzene group. Sometimes it simply referred to as a acid group. Diagram 1.1 1‚4-benzenedicarboxylic acid Summarized ways the carboxylic acid group is shown : CO2H or --- COOH ( Unknown ‚2013
Premium Carboxylic acid Acetic acid
Lab 2B: Diels-Alder Reaction Zhouxiang Xu TA: Bhumasamudram Jagadish Experiment performed: Jan 28th‚ 2014 Report Due: Feb 10th 2014 Result: For the Diels-Alder reaction: Maleic acid is 0.002 mol 2‚3-dimethyl-1‚3-butadiene is 0.002 mol The theoretical yield is 0.36g Cycloaddition product is 0.358g (maybe it was not completely dry when I weighted.) The % yield of Diels-Alder reaction is 99.4% For the hydrolysis: The theoretical yield of hydrolysis is 0.396g The
Premium Carboxylic acid Stoichiometry Chemical reaction
Animal Husbandry Production and Global Climate Change Lou yujie Zhaoli Faculty of Animal Science and Technology‚ Jilin Agricultural University‚ Changchun‚ Jilin‚ 130118‚ China Abstract: The influence of methane and ammonia which come from animal production on global climate changes was discussed in this paper. Meanwhile‚ the author analyzed the effect of this change on agriculture and animal industry‚ and also analyzed its control measures in this article.. Key words: animal industry production
Premium Nitrogen Ammonia Acid
The Preparation of Methyl Salicylate Introduction: Esters have various smells that differ due to the types of carboxylic acids and alcohols one mixes together. This is called esterfication. The reaction is catalyzed by an inorganic acid usually H2SO4 Purpose: In this lab Methanol alcohol and Salicylic acid were reacted together to form Methyl Salicylate. This was done to determine the characteristic odour of the Methyl Salicylate. Safety: Safety goggles must be worn at all times. Methanol: Toxic
Premium Ester Carboxylic acid Ethanol