Acid-base titration (13).docx

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UNIVERSITY OF BALAMAND Faculty of Sciences Department of Chemistry Basic Chemistry Laboratory Names: Lara Frangieh ID: A0810408 Anthony Dahdah ID: A0810784 Experiment Title: Acid-base Titration Experiment Week: Week 3 Date: 22/10/09 Submitted to: Dr. Robin Taleb 1
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Introduction: A titration is a laboratory process for quantitative study. In a titration two reagents are mixed. One of these two reagents is called “Titrant” . A reagent is called titrant if it has a known concentration, and it is added as a solution from the burette. During a titration, the two reagents must react completely. The end of a titration, the equivalence point, is determined by a colorimetric indicator or by a pH-meter. The aims of the experiment were: 1. To prepare a solution of potassium acid phthalate KHP. 2. To prepare a solution of sodium hydroxide NaOH. 3. Titration of the KHP solution with the NaOH solution in order to calculate the concentration of NaOH solution. 4. Titration of the unknown HCl solution (2) with the NaOH solution, in order to determine its concentration. Methods: Used equipments: Analytical balance 250 ml Erlenmeyer flask 500 ml Volumetric flask Spoon Glass of wrist watch 100 ml beaker Graduated cylinder 10 ml pipette Burette Magnetic agitator Used Chemicals: 0.8 g of potassium acid phthalate (KHP) M.W=204g/mol 2 g of solid sodium hydroxide (NaOH) 2
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Phenolphthalein(colorimetric indicator) Distilled water 10 ml of unknown HCl solution (2) Reactions: 1. KHC 8 H 4 O 4 + NaOH H 2 O + K C 8 H 4 O 4 Na 2. HCl + NaOH H 2 O +NaCl Experiment 2.1:
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  • Winter '15
  • Amir Alimohammad
  • Sodium hydroxide, M HCl

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