Date ___________________ 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
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Complexometric Titration Topics to be discussed: • Complex ions & ligands. • EDTA in complexometric titration. • Indicators for complexometric titration. • Titration curve • Application of complexometric titration. 1 Complexometric titration method • An analytical method involving complex formation reactions. • A complex ion (or coordinate complex) is formed from electron donating compound & a metal ion. 2 Coordination Complex • The electron donating compound is a neutral organic molecule
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Synopsis The objective of this experiment is to determine the percentage by mass of calcium carbonate‚CaCO3 in toothpaste using back titration technique. A known weight portion of toothpaste is obtained to react with known volume and concentration of standard acid solution. After completing the reaction‚ the resulting solution containing excess acid is back titrated with known volume and concentration of standard base solution. Determination of excess acid after reaction allow us to calculate the
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Communities. N.p.‚ n.d. Web. 28 May 2010. <http://cnx.org/content/m17138/latest/>. 3. "Phenolphthalein." Digipac Microcomputer Software. N.p.‚ n.d. Web. 28 May 2010. <http://digipac.ca/chemical/equilibrium/phenolpthalein.htm>. 4. "Titration." An Introduction to Chemistry - Bishop. N.p.‚ n.d. Web. 28 May 2010. <http://chiralpublishing.com/Bishop_Titration.htm>. 5. stander. "Acids and Bases." Chemistry and New Zealand. N.p.‚ n.d. Web. 28 May 2010. <http://www.chemistry.co.nz/acids_and_bases
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provides us with one method for determining the amount of either the acid or the base in a solution. The general method employed is that of titration. Titration is a procedure for determining the amount of substance A by adding a carefully measured volume of a solution with known concentration of B until the reaction between them is just complete. Titrations are not use exclusively with acids and bases but anytime you need to determine the concentration of a species in a solution. In this lab‚ we
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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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BACK TITRATION AIM - To estimate volumetrically the amount of calcium carbonate present in the eggshell and analyzing the sources of errors to evaluate the result. Part A: Standardization of 2M NaOH(aq) Data Collection : Weight of substances Uncertainty Weight of watch glass + salt (potassium hydrogen phthalate) w1= 23.4380g ± 0.001g Weight of watch glass ( after emptying the salt)w2 = 21.5430g ± 0.001g Weight of salt (potassium hydrogen phthalate) w1 –w2= (23.4380± 0.001g) – (21
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___________________ Functional Groups Class __________________ SMALL-SCALE EXPERIMENT VITAMIN C IN TABLETS 38 Small-Scale Experiment for text Section 23.3 OBJECTIVES • Determine the vitamin C content of vitamin C tablets by iodometric titration. • Observe the oxidation of vitamin C in aqueous solution. INTRODUCTION Vitamins regulate biochemical reactions that take place within living cells. The human body requires vitamins only in tiny amounts. For a compound to be classified as a
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Maddie Sanchez 5-13-13 Period 5 I. Title: Titration Lab II. Purpose: To determine the concentration of an acid or a base exactly by neutralizing the acid or base with an acid or base concentration. III. Materials: The materials needed are a burette‚ boat dish‚ soap‚ beaker‚ ring stand‚ clamp‚ funnel‚ phenolphthalein (indicator)‚ scale‚ 250 mL flask‚ distilled water‚ stirrer‚ acid‚ and base. IV. Procedure: This lab was done in two days. On day one the first thing
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Chemistry Experiment Double Indicator Titration 1 Aim The purpose of this experiment is to find the composition of a sample of sodium carbonate mixture by titration. Introduction The reaction between sodium carbonate and hydrochloric acid occurs in 2 stages‚ with the formation of hydrogen carbonate ion as the intermediate product. Na2CO3(aq) + HCl [pic] NaHCO3(aq) + NaCl(aq) NaHCO3(aq) + HCl(aq) [pic] NaCl(aq) + H2O(l) + CO2(g) [pic] Requirements Hydrochloric
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