Potentiometric Titration of an Acid Mixture, Lab Reports of Chemistry

Download Potentiometric Titration of an Acid Mixture and more Lab Reports Chemistry in PDF only on Docsity! UNIVERSITI TUNKU ABDUL RAHMAN FACULTY OF SCIENCE BACHELOR OF SCIENCE (HONS) CHEMISTRY YEAR 1 TRIMESTER 1 UDEC1224 CHEMISTRY LABORATORY II Name of group members 1. Chan Yong Li (19ADB04214) 2. Foo Yu Cheng (18ADB02613) 3. Loo Xin Tong (19ADB02955) Practical Group P3 Practical Sub-group G3 No. of Experiment Experiment 2 Title of Experiment Potentiometric Titration of an Acid Mixture Date of Experiment 19th August 2019 Date of Submission 26th August 2019 Name of Lecturer Dr Ooi Mei Lee 1.0 Title Potentiometric Titration of an Acid Mixture 2.0 Objectives 1. To determine the quantitative composition of a solution, which is a mixture of monoprotic strong acid and a triprotic weak acid by potentiometric methods. 2. To construct a potentiometric titration and construct a titration curve. 3.0 Calculations Part A: Standardization of Approximately 0.05 M Sodium Hydroxide Considering the equation of the reaction: NaOH (aq) + KHC8H4O4 (aq) → KNaC8H4O4 (aq) + H2O (ℓ) From this equation, 1 mole of NaOH reacts with 1 mole of KHC8H4O4. nNaOH=nKHP MNaOHV NaOH 1000 = mKHP MMKHP MNaOH= mKHP(1000) MM KHP(V NaOH ) Using the formula: MNaOH= mKHP(1000) MM KHP(V NaOH ) , Let: MNaOH=¿ Molarity of sodium hydroxide solution mKHP=¿ Mass of KHP used in each titration MM KHP=¿ Molar mass of KHP V NaOH=¿ Volume of sodium hydroxide solution used in each titration