The acid-base titration curves help to find the pKa‚ Ka‚ and pH at equivalent point. At the beginning pH for HCl is 1.90 which is lower than the 3.28 for acetic acid; thus‚ strong acid (HCl) means lower pH and weak acid (acetic acid) means higher pH. Then at the equivalent point for the titration HCl-NaOH the pH is 7‚ which mans that is neutral‚ in other words there are enough NaOH mmol to neutralize the HCl mmol present; also‚ the solution contains only water and NaCl the salt derived from the titration
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including heating reaction mixture under reflux‚ extraction using a separatory funnel‚ drying with anhydrous sodium sulfate‚ and refractometry. Experiment Scheme: First‚ we prepared the solvent-nucleophile medium. We combined 44mL 7.7M sulfuric acid with 4.75g ammonium chloride and 8.75g ammonium bromide‚ and we heated the mixture with stirring to dissolve the salts. We put 17mL into a separatory funnel for use in the second reaction‚ and placed the rest into a reflux apparatus for our first
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a) What other name(s) does this chemical go by? (i.e. synonyms) Other names for sodium bicarbonate are baking soda‚ sodium hydrogen carbonate‚ and carbonic acid sodium. (b) What is the type(s) of hazard associated with this chemical? (i.e. poisonous‚ biohazardous‚ ...) According to the Globally Harmonized System (GHS) of Classification and Labeling of Chemicals‚ sodium bicarbonate has not been categorized as hazardous. (c) What should you do if this chemical splashes in your eyes or is spilled
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BEHAVIOUR OF AMINO ACIDS IN SOLUTION Abstract In this practical the acid-base behaviour of amino acids was assessed. Amino acids are amphoteric. They have the basic (amine) and the acidic (carboxylic) functional groups. These show the same type of equilibrium reactions that all weak acids and bases undergo‚ and the relative amount of each can be altered by adjusting the pH of the solution. For this practical glycine was used as a model to show this unique nature of amino acids. A series of
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GROUP MEMBERS: VIMAL SIEWNARINE - #52844 JASON MATHURA - #60927 FIDEL MENDOZA- #56834 BRAD NANDO- # VIMAL BALAY - #52555 CRISTINA LUTCHMAN -#52516 LAB #1‚ #2‚ #3‚ #4 CHEM 2006 -ANALYTICAL INSTRUMENTATION LECTURER – MRS. TRICIA JONES LAB 1 TITLE: Organic Compound Identification Using Infrared Spectroscopy Aim: To identify the functional groups in organic compounds using infrared spectra. APPARATUS AND REAGENTS: Nicolet 380FTIR
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Effects of Citric Acid on the Viscoelasticity of Cornstarch Pastes MADOKA HIRASHIMA‚ RHEO TAKAHASHI‚ AND KATSUYOSHI NISHINARI* Department of Food and Human Health Sciences‚ Graduate School of Human Life Science‚ Osaka City University‚ Sumiyoshi‚ Osaka 558-8585‚ Japan The effects of citric acid on the rheological properties of cornstarch pastes were studied by steady shear and dynamic oscillatory viscoelasticity‚ intrinsic viscosity measurements and microscopic observation. The pH of cornstarch
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Presence of Insecticides & Pesticides in Fruits & Vegetables SCHOOL : K .V N T P C CHEMISTRY PROJECT REPORT STUDY THE PRESENCE OF INSECTICIDES AND PESTICIDES IB FRUITS AND VEGETABLES Name : Class : Reg. No : Examiner Teacher-in charge. CERTIFICATE This is to certify that the project was done by …………………………… Reg. No ……………….. Is in partial fulfillment of Chemistry Practical Examinations
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Julie Nguyen Equilibrium Lab 4-28-14 I. Purpose To study the affect of temperature & concentration changes on systems in equilibrium II. Safety Wear apron Wear goggles Do not spill chemicals Clean up after use Wash hands Chemicals are TOXIC (by Britney Spears) III. Procedure A. Iron-thiocyanate equilibrium Pipet .3mL of 1 M iron (III) nitrate and .3 mL of 1 M ammonium thiocyanate. into clean 250 mL beaker. Add 75 mL of DS water. Mix well. Divide the solution into equal
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properties of pure chemical substances by subjecting them to various environmental extremes. Procedure: Filled each test tube with substances provided and subjected them to various conditions. These conditions included‚ heat‚ cold water‚ hot water‚ acid and basic additions and tested on litmus paper. The reactions were observed and documented at each step. Data tables: Substance name Color Odor Effect of heat Cold H2O Hot H2O Litmus Test Dilute HCl Dilute NaOH Mg Small silver‚ metallic
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[pic] |THE MECHANISM FOR THE ACID CATALYSED HYDROLYSIS OF ESTERS | | | |This page looks in detail at the mechanism for the hydrolysis of esters in the presence of a dilute acid | |(such as hydrochloric acid or sulphuric acid) acting as the catalyst. It uses ethyl ethanoate as a typical| |ester.
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