be used to graph the titration curves which help to identify an unknown amino acid. IntroductionAmino acids are simple monomers which are strung together to form proteins. Amino acids play a key cellular role in structure and function. Proteins themselves participate in nearly every physiological event in the cell. Since all amino acids contain at least one amino and one carboxyl group‚ they are classified as amphoteric substances (meaning that they can act as either an acid or as a base) (1). Treating
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Acid-Base Titrations 6-3: Concepts in Acid-Base Titrations Titrations provide a method of quantitatively measuring the concentration of an unknown solution. In an acid-base titration‚ this is done by delivering a titrant of known concentration into an analyte of known volume. (The concentration of an unknown titrant can also be determined by titration with an analyte of known concentration and volume.) Titration curves (graphs of volume vs. pH) have characteristic shapes. The graph can be used
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Redox Titration Analysis of a Commercial Bleach A. Purpose ! ! ! To review oxidation-reduction reactions and their stoichiometry. To learn the concept and technique of redox titration. To determine the percent (m/v) of an active ingredient‚ sodium hypochlorite (NaOCl)‚ in a commercial bleaching agent. B. Theoretical Background Whereas acid-base reactions involve the transfer of a proton‚ oxidation-reduction or redox reactions involve the transfer of electrons from one substance to
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NaOH Standardization and Titration of an Unknown Organic Acid Overview: Methods for counting the number of molecules in a sample is a major emphasis of laboratory work. In this experiment we will use the method of titration to count the number of acid molecules in a solution. Measuring mass is a relatively easy procedure to do in the lab (although a balance is expensive). Counting the number of particles requires more effort. Molecular counting can be done by setting an unknown amount of a substance
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PurposeIn this experiment‚ sodium hypochlorite (NaOCl) in acetic acid mixture was used to oxidize emdo-borneol (an alcohol) to camphor (a ketone). The product would then be purified by sublimation and then be analyzed by Infrared spectroscopy and melting point test. Procedure and ObservationsPlease refer to the lab manual and the carbon copy attached. Data and CalculationsWeight of endo-borneol = 0.2013gNo of moles of endo-borneol = 0.2013g/154.25g mol-1 = 1. 305mmolSince one mole of endo-borneol
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Potassium Hydroxide (KOH) Introduction Potassium hydroxide is an inorganic compound with the formula KOH‚ commonly called caustic potash. Along with sodium hydroxide (NaOH)‚ this colorless solid is a prototypical strong base. It has many industrial and niche applications. Most applications exploit its reactivity toward acids and its corrosive nature. In 2005‚ an estimated 700‚000 to 800‚000 tonnes were produced. Approximately 100 times more NaOH than KOH is produced annually. KOH is noteworthy
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as a reference material in all volumetric & mass titrimetric method.A reagent solution of accurately known concentration. * End point-point at which the reaction is observed to be complete and there is permenant colour change at the end of titration. * Equivalent point-point at which an equivalent amount of titrant is added to analyte. * Titrant-the reagent which is place in the burette & will added to analyte until end point reached. * Titre value-the amount of titrant by taking the
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NEUTRALIZATION TITRATIONS INTRODUCTION The neutralization of hydronium or hydroxide ion to form water is widely used as the basis for volumetric determinations of acids‚ bases and salts of weak acids. The reaction is characterized by a rapid change in pH near the equivalence point‚ a change that is readily detected by an acid-base indicator or that can be followed electrically by use of a pH meter. Neutralization titrations are performed with standard solutions of strong acids or strong bases
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Acid/Base Titrations Pre- Lab Questions 1. Using your textbook or a handbook‚ look up the formula and structure of potassium hydrogen phthalate (KHP) used to standardize the solution of NaOH in this experiment. Calculate the Molar Mass of KHP. Molar Mass= 204.22 g/mol Formula: KC8H5O4 2. Using your textbook or chemical dictionary‚ write the definition of indicator. Indicator- a substance added at the beginning of the titration that changes color at (or very near) the equivalence
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Sodium From Wikipedia‚ the free encyclopedia This article is about the chemical element. For the PlayStation Home game‚ see Sodium (PlayStation Home). For the racehorse‚ seeSodium (horse). "Natrium" redirects here. For the town in West Virginia‚ see Natrium‚ West Virginia. Sodium 11Na
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