8. (3 pts) Complete the reaction below between methyl salicylate, a fragrant com

Question

8. (3 pts) Complete the reaction below between methyl salicylate, a fragrant component in oil of wintergreen, and sodium hydroxide. H20 HCI NaOH obeained when 12.95 mL of methyl salicylate (d- (3 pts) Calculate the theoretical yield of product C 1.174 g/m) react with 12 mL of 12 M sodium hydroxide. Atomie masses: C:12, H:1, 0:16, Na:23 a) Theoretical yield (in g) b) 3 pt) if the experimental mass of product C obtained is 10.35 g what is the percent yield of this reaction % Yield c) (3 pts) What is the thcoretical yield of product B? Moles of EB d) (3 pts ) In a similar reaction you performed in the lab this semester, why was Aliquat 336 used? 9. a. (3 pts) Given that the pk, of carbonic acid (the cornjugate acid of bicarbonate) is 6.35, can extract 4-nitrophenol (pk, -7:15) or 2,5-dinitrophenol (pK. -5.15) or will it extract both? (circle one) aitrophenol2.5-dinitrophenol both compounds sentences (maximum), explain your answer to the last question. b. (2 pts) In one or two

Explanation / Answer

8. Drawn below is the complete reaction scheme, structures of compound A, B and C.

a) moles of methylsalicylate = 12.95 ml x 1.174 g/ml/152 g/mol = 0.10 mol

theoretical yield of product C = 0.10 mol x 138 g/mol = 13.8 g

b) Actual yield = 10.35 g

So,

percent yield = 10.35 g x 100/13.8 g = 75%

c) Theoretical yield of B = 0.10 mol x 32 g/mol = 3.2 g

d) In an similar reaction in lab, aliquot was used, to test if the reaction has proceeded well in the forward direction to produce only product C and the purity of the formed product.

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