Experiment 25_Determination of Dissociation Constant of a Weak Acid.pdf

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Student Name: Mina NakhlaExperiment Name: Experiment 25:Determination of Dissociation Constant of a Weak AcidSubmission Date: 03-029-2021Lab Partners: Micheal and AnathonyReport ElementPoints EarnedMaximum ValueAbstract__________10Introduction__________15Experimental__________15Results__________25Discussion and post labquestions___________30References___________5Late Penalty__________–10 pts/calendar day lateFinal Report GRADE100
Experiment 25: Determination of Dissociation Constant of a Weak AcidMina Nakhla, Micheal and anthony 03-029-2022General Chemistry II CHEM 1204Justin BogartDepartment of Chemistry and Biochemistry Maxwell Becton College of Arts and SciencesFairleigh Dickinson UniversityAbstractIn this experiment, the ionization constant of an unknown weak acid was determined bytitrating it; ithas a strong base (NaOH solution). This was accomplished by using the titrationcurve based on the data. The concentration of the unknown acid was also determined by usingthe base at the equivalence point, its molarity, and the volume of acid used. The results show thatthe ionization constant for the unknown acid was () and the concentration was (1)3. 1620βˆ’4.5
Introduction:Acids and bases are important in many areas of chemistry and biology. Chemicalbehavior allows us to categorize compounds as acids or bases. An Arrhenius acid is defined as achemical that creates hydronium ions () in aqueous solution, whereas an Arrhenius base is𝐻3?+defined as a substance that produces hydroxide ions (). The Brnsted-Lowry hypothesis?π»βˆ’provides a more relevant definition of acids and bases. A Brnsted-Lowry acid is defined as aproton donor, whereas a Brnsted-Lowry base is defined as a proton acceptor(1)𝐻𝐢? (π‘Ž?) + 𝐻2? (𝑙) β†’ 𝐻3?+(π‘Ž?) + πΆπ‘™βˆ’In this reaction, the acid HCl donates a proton ( H+) to a water molecule (the base) toproduce the ions+ and Cl-. HCl is a strong acid, which means that ionization is essentially𝐻3?+complete; nearly 100% of the HCl in solution has been converted toand Cl- ions. By𝐻3?

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Term
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