Lab Report 22 Acids and Bases (Final)

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Faulkner University *

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1312

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Health Science

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Dec 6, 2023

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docx

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7

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Acids and Bases: Analysis Messiah I. Hayes Department of Health Science, Faulkner University Professor Mark Brenneman May 1,2022
Abstract This lab focuses heavily on titrating an acid with a base. During this lab, students used titration with a standardized base to determine the amount of acetic acid within vinegar. Not all parts of this lab experiment were completed. Some students completed Part A only while others were responsible for Part B only. The results for this lab showed that the moles of NaOH is equal to the moles of acetic acid, which is 0.004394, 0.004524, 0.005031. The average molarity of acetic acid was found to be equal to the molarity of NaOH which is 0.26M. This titration lab required a delicate touch with the buret.
Introduction It’s always strange noticing chemistry in modern society. The concepts learned throughout the semester become more visible and comprehendible at the grocery store. Wine is beverage that once gone bad is sour to the taste. The sourness is due to the presence of acetic acid. This acid after formic acid, is the second simplest carboxylic acid. Acetic acid is also a presence in other liquid substances found at the neighborhood Publix. One of those substances being vinegar. About 4% of acetic acid is found within vinegar which makes it one of the main components in it excluding water and other trace elements. It has been made known that vinegar is mostly diluted acetic acid produced by the oxidation of ethanol and fermentation. Being that vinegar is a dilute solution of acetic acid, a base must be used in titration. Sodium hydroxide is used to neutralize the acid, because of its strong basic nature. Sodium hydroxide dissociates within water to form ions. In order to find the concentration of an acidic solution, one must titrate the acidic solution with a basic solution. Scientists use titrations to detect the equivalence point. This is the point is when equal amounts of reactants have been mixed. In this lab experiment the technique of titration is heavily involved. This technique was cultivated in previous labs and a relief to execute correctly. Titration has happened when the clear solution has undergone a chemical reaction changing to a pinkish purple color. For the most precise numbers, a student strives to catch the reaction at the earliest sign of change. The lighter the shade of pink, the more sooner the change is registered. Another technique that was is in the lab experiment was using the buret. This tool was used in previous labs before lab #22, so it wasn’t difficult to use in this lab setting.
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