can you work out the problem 6,7,and 8 show the work and number them ES 164 1 IO

Question

can you work out the problem 6,7,and 8 show the work and number them

ES 164 1 ION cylic ocid, is both an organic ester and arn painkiller (analgesic) and as a fever-reducing Isalicylic ncid remains imact in ihe acidic niestinal tract, it forms the salicylate of atoms grouping H2O 9-1) SCREAM ou are to analyze a guava (a tropical fruit) for its Vitamin C (ascorbic acid) content. Whole titration with standard fresh guava are pureed and the ascorbic acid extracted into water for ti Kio, to the blue l2 starch endpoint. Data 513 Mass sample (g) KIO, Concentration (M) .00105, 24.0 215 Final buret reading (mL) Volume KIO, added (mL) Calculations Moles KIO, added (mol) Moles ascorbic acid (mol) Mass ascorbic acid (mg) mg ascorbic acid /g sample Average (mg ascorbic acid g sample) Complete the above table. Be sure at least one set of calculations is shown. (15 points)

Explanation / Answer

Q6

m = 2.45 g of SAcid

mol of S.acid = mass/MW = 2.45/138.121 = 0.01773 mol of S.acid

ratio is 1:1 so

mol of ASA = 0.01773 mol expected

mass = mol*MW = 0.01773*180 = 3.1914 g of ASA

then,theoretical yielf of ASA --> 3.1914 g

b)

% yield = real /theoretical * 100%

% yield = 2.8/3.1914 * 100

% yield = 87.735 %

c)

% purity -->

mmol of acid = MV = 18.9*0.105 = 1.9845 mmol of acid

mmol of ASA = 1.9845

mass = mmol*MW = 1.9845*180 = 357.21 mg = 357.21 mg = 0l.357 g

% purit T= 0.35721 / 0.395 *100 = 90.432 % pure

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