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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oxidizing agent. In this lab‚ a solution of KMnO4‚ an oxidizing agent‚ will be standardized by titration with a solution containing a known concentration of iron (II) ions‚ (Fe+). The concentration of oxalic acid solution will be determined by titration with the MnO4- solution that had been standardized first. The purpose of this lab is to standardize a solution of potassium permanganate by redox titration with a standard solution of iron (II) ions. A solution of oxalic acid is then titrated with the
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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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Introduction A titration is a technique used to find the solution of known concentration in the concentration of another unknown solution. Typically‚ the known solution is added from a known quantity of unknown solution until the reaction is complete. Titrations are also often used to determine the pH of a solution. This is important because without knowing how acid or basic a solution is people could hurt themselves and others but mixing chemicals together that are lethal. The objective of the
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learn some technique in volumetric analysis: Redox titration. • To review the stoichiometry of an oxidation- reduction reaction. • To determine the concentration of an unknown sodium oxalate (Na2C2O4) solution by titrating it against standardized potassium permanganate solution (KMnO4). • To determine the percent by mass of Fe(II) in the form of ferrous ammonium sulfate Fe(NH4)2(SO4)2.6H2O in a mixture by redox titration. B. Theory: (electron transfer reactions)
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Chemistry 12 12/Oct/2011 Titration- Analysis of Aspirin Tablets Objective: Determine the percentage of aspirin (acetylsalicylic acid) present in two different commercial tablets by titrating the solution with a base. Also determine whether the aspirin is a strong or weak acid according to the Bronsted- Lowry and Lewis theories and deduce the formula of the acid- base reaction. Independent Variable: The amount of base (NaOH) in moles that are needed to neutralize the solution. Dependent Variable:
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Experiment TITRATION OF A COLA PRODUCT The CCLI Initiative Computers in Chemistry Laboratory Instruction LEARNING OBJECTIVES The objective of this laboratory experiment is to determine the molar concentration of phosphoric acid in a cola product. BACKGROUND Titration is an analytical technique used to find the concentration of a known volume of unknown substance by adding a known concentration of a known substance. As the unknown and known substance react‚ we look for a "telltale" indication
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EXPERIMENT 4: BACK TITRATION CONTENT NO. CONTENT PAGE 1. Synopsis 3 2. Introduction 3 3. Theory 4 4. Procedure 4 5. Results and Calculations 5 – 6 6. Discussion 7 7. Conclusion 7 8. References 8 1. SYNOPSIS The purpose of this experiment is to use the back titration method to determine the percentage of calcium carbonate in toothpaste. Instead of using standard titration methods where an acid is titrated directly using a standard solution of a base‚ back titration is used because
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Chapter 13: EDTA titrations Complexation Reaction: A reaction between two species having a well-defined stoichiometry. The resulting bond is not permanent from a covalent standpoint. Complex: The resulting structure formed during a complexation reaction. Coordination Center: Metal ion in a complex (Lewis acid) Ligand: The species that complexes the metal center. A single species can form one or more bonds with a single coordination center (Lewis base) Coordination Number: Number of ligand bonds
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Titration Analysis of Vinegar Student: Araik Movessian Grade: 12 Course: SCH4U Teacher: Tijana Knezovic Purpose and Introduction: In this experiment the question of “what is the molar concentration of acetic acid in a sample of vinegar?” was answered via titration using a standard solution of sodium hydroxide‚ NaOH(aq). In this investigation‚ students are to act as quality control chemists. Their purpose is to test the acetic acid concentration of the vinegar to discover whether it
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