Alferid Hussin ShifaCHM (Course 124) (Section 01)Lab (8) Oct 24/2019Lab 8: Determination of the Dissociation Constant of a Weak AcidObjective: The purpose of this experiment is to perform a redox titration and Calculate the pH, volume, and molarity of an unknown monoprotic acid.List of chemicals, & hazard:- 0.1 M Sodium Hydroxide – NaOh- Unknown AcidList of Chemicals with Safety Hazard: There may be a Hazards chemical in this experiment.I. Safety Precautions:- Be cation when handling the unknown acid, it may be highly hazards solutionII. Waste Disposal:- Disposal the mixtures in the sink, or into the appropriate waste beaker.List of Equipment:Erlenmeyer flask Pipet aid & disposable pipet’s (Three of 10 mL)Beaker standDistilled water beretpH meter/universal indicator paper Pre-Lab Questions:NoneProcedure in short: 11. First to determine the pH of a weak monoprotic acid. 2. Titrate a 20 mL of the unknown acid, with an inductor present, with NaOH. When 3. When the color change is observed, measure molarity and volume of both at the end of the titration. 4. divide the volume by 4 and take calculations at quarter increments for the pH changes of the unknow acids.5. Repeat this process if needed. Result1 2 3 4 50510152025Volume of NaOH vs pHNaOH (ml) pH2Acid (ml) Base (ml) pH1/4ml 20 4.375 4.561/2ml 20 8.75 5.053/4ml 20 14.25 5.57Equivalence Point 20 19 10.4Post Equivalence Point 20 23.75 12.56Post lab None Any specific observations:- No specific observations were madeConclusion:- In the lab, we use titration to identify the concentration of acid using the pH reading between the acid and the NaOH
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