chem report fana

chem report fana - EXPERIMENT 3 : ACID-BASE TITRATION...

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EXPERIMENT 3 : ACID-BASE TITRATION DETERMINATION OF CONCENTRATION OF HYDROCHLORIC ACID SOLUTION NAME: NURUL FAHANA BINTI ZAWRI PARTNER: SITI NURFARHANA BT SOHIMEE DATE OF EXPERIMENT: 24 JUNE 2011 LECTURER: PUAN NOR HAYATI ABU BAKAR
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Objectives : 1.To prepare a standard solution of oxalic acid 2.To standardise 0.2 M NaOH solution 3.To determine the concentration of HCL solution 4.To acquire the correct techniques of titration Introduction : Titration is a technique used to determine the concentration of a solution using another solution with a known concentration. Standards in acid-base titrations One of the solutions involved in a titration is used as a standard solution. The standard solution can be classified as either primary or secondary. A primary standard is prepared by dissolving an accurately weighed pure solid of known molar mass in a known volume of distilled water. A primary standard is used to determine the molarity of the other solution, known as secondary standard. Solutions of NaOH and HCL used in titration to be standardised because they contains impurities. Solid NaOH is hygroscopic (it absorbs moisture). Thus, it is difficult to obtain its Equivalence point and end point An equivalence point at which exact reaction occurs between the two reagents according to the stoichiometry. To detect the equivalence point, an indicator which produces a change in colour is
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chem report fana - EXPERIMENT 3 : ACID-BASE TITRATION...

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