Rinse skin with lots of cool water if splashed with chemical and report any spills to the teacher immediately. Source: Nelson Chemistry 11 (2010) ACID BASE TITRATION Purpose: To determine the concentration of solution of sodium hydroxide by acid-base titration and analyse the shape of a titration curve. . Pre-Lab: / 11 I /8 K/U / 5 C 1) What colour is the indicator phenolphthalein in an acidic solution and in a basic solution? (2 K/U)
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Experiment #10 Volumetric Analysis The Titration of Acids and Bases Purpose This experiment will allow you to gain practical experience in the preparing standard solutions‚ using a pipette and a buret‚ and performing standard titrations. You will use this experience to experimentally determine the concentration of acetic acid in an unknown solution. There are three parts to this experiment‚ they are 1. Preparation a standard solution of oxalic acid (~0.07 M) 2. Preparation a sodium
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Experiment 4 SOLUTION STOICHIOMETRY ACID-BASE TITRATIONS Determination of the Percent Acetic Acid in Vinegar Objectives: (1) To introduce and use the concept of solution stoichiometry (2) To specifically use solution stoichiometry to determine the percent of acetic acid in vinegar. (3) To prepare a standard solution by the method of titration. Consider the following balanced chemical equations: (1) HCl + NaOH ------> NaCl + HOH (2) H2SO4
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hydroxide solution to 50ml. 2. Pipette the KH(C8H4O4) solution into a conical flask. Use three drops of phenolphthalein as the indicator. 3. Titrate carefully until a colour change from colourless to pink is observed. 4. Perform a rough titration first‚ then repeat until 3 concordant
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Redox reactions (Redox terminology‚ galvanic cells‚ standard electrode potentials‚ strength of oxidizing/reducing agents‚ corrosion and protection against it) Oxidation is defined as the loss of electrons and reduction is defined as the gain of electrons. Oxidizing agents‚ such as oxygen are defined as substances which accept electrons; reducing agents are substances which donate electrons. Redox reactions are: a) The reactions of metals with non-metals 2Na+Cl2→2Na+Cl- b) The reactions
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Titrations D1 Laura Andrijaityte Chemistry Assignment BTEC Forensic Science Titration definition: A measured amount of solution of unknown concentration is added to a known volume of a second solution until the reaction between them is complete; the concentration of the unknown solution (the titre) can then be calculated. Acid based titration: determination of the concentration of an unknown acid or base by neutralizing the acid or base with an acid or base of a known substance. Redox
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Chem Factsheet September 2002 Number 37 Redox Equilibria I: Standard Electrode Potentials and Cells To succeed with this topic you need to: • be familiar with the concept of equilibrium (Factsheet 09); • be able to assign oxidation numbers to elements (Factsheet 11). After working through this Factsheet you will: • understand the link between cells and oxidising and reducing powers (redox reactions); • have met the Standard Hydrogen Electrode and why it is needed; • know the definition for Standard
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each of the following reactions is a redox reaction: a) H2(g) + I2(s) → 2HI(aq) b) 2NaHCO3(aq) → Na2CO3(aq) + H2O( ) + CO2(g) c) 2HBr(aq) + Ca(OH)2(s) → CaBr2(aq) + 2H2O( ) d) PCl5( ) → PCl3( ) + Cl2(g) 2. Write three different definitions for a redox reaction. 3. Explain why fluorine has an oxidation number of −1 in all its compounds other than fluorine gas‚ F2(g). 4. When atoms of one element combine with atoms of another element‚ is the reaction a redox reaction? Explain your answer. 5
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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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Purpose The purpose of this experiment is to observe a redox reaction and understand what it means. We will observe the new bonds formed and the importance of the electron in the formation of these new bonds. Materials Boileezers (boiling chips) Desiccant 0.17M acetic acid (acidified water) Solution of Sodium thiosulfate Granular zinc Iodine crystals Zinc ion and iodine-iodide-triiodide ion in water Solid zinc iodide Mineral oil Silver nitrate Magnesium turnings 3M Hydrochloric acid (HCl) solution
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