Consider the following method for the analysis of salicylic acid (MW 138.121) powder. "Dissolve about 500 mg of Salicylic Acid, accurately weighed, in 25 mL of diluted alcohol that previously has been neutralized with 0.1 M NaOH, add phenolphthalein TS, and titrate with 0.1 M NaOH VS." 0 OH OH Calculate the percentage purity of the salicylic acid from the data below. Show your reasoning clearly and record your final answer to four significant figures. Mass salicylic acid weighed: 503.7 mg Concentration NaOH = 0.1056 M Volume NaOH required to neutralise salicylic acid mixture = 45.45 mL

Chemistry
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ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
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Chapter4: Types Of Chemical Reactions And Solution Stoichiometry
Section: Chapter Questions
Problem 47E
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Consider the following method for the analysis of salicylic acid (MW 138.121) powder.
"Dissolve about 500 mg of Salicylic Acid, accurately weighed, in 25 mL of diluted alcohol
that previously has been neutralized with 0.1 M NaOH, add phenolphthalein
TS, and titrate with 0.1 M NaOH VS."
OH
OH
Calculate the percentage purity of the salicylic acid from the data below.
Show your reasoning clearly and record your final answer to four significant figures.
Mass salicylic acid weighed: 503.7 mg
Concentration NaOH = 0.1056 M
Volume NaOH required to neutralise salicylic acid mixture = 45.45 mL
www.
Transcribed Image Text:Consider the following method for the analysis of salicylic acid (MW 138.121) powder. "Dissolve about 500 mg of Salicylic Acid, accurately weighed, in 25 mL of diluted alcohol that previously has been neutralized with 0.1 M NaOH, add phenolphthalein TS, and titrate with 0.1 M NaOH VS." OH OH Calculate the percentage purity of the salicylic acid from the data below. Show your reasoning clearly and record your final answer to four significant figures. Mass salicylic acid weighed: 503.7 mg Concentration NaOH = 0.1056 M Volume NaOH required to neutralise salicylic acid mixture = 45.45 mL www.
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