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[CHEM 1120]LAB#6: Synthesis of Acetylsalicylic Acid
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[CHEM 1120]LAB#6: Synthesis of Acetylsalicylic Acid [CHEM 1120]LAB#6: Synthesis of Acetylsalicylic Acid [CHEM 1120]LAB#6: Synthesis of Acetylsalicylic Acid [CHEM 1120]LAB#6: Synthesis of Acetylsalicylic Acid [CHEM 1120]LAB#6: Synthesis of Acetylsalicylic Acid [CHEM 1120]LAB#6: Synthesis of Ace...

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  • November 22, 2023
  • 2
  • 2023/2024
  • Exam (elaborations)
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  • chem 1120
  • chem 1120lab6 synthesis of acetylsalicylic aci
  • synthesis of acetylsalicylic aci

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  • [CHEM 1120]LAB#6: Synthesis of Acetylsalicylic Aci
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[CHEM 1120]LAB#6: Synthesis of Acetylsalicylic Acid

1. salicylic acid and salicin: bark of the white willow tree
2. Aspirin: Acetylsalicylic acid
ester group
3. Aspirin synthesis equation: salicylic acid + acetic anhydride

catalyst H2SO4 sulfuric acid

aspirin and acetic acid
4. recrystalization: soluble in high temp
insoluble in low temp
impurity remain in mother liquor
isolated by vacuum filteration
5. percent yield formula (*NOT for purity*): actual yield(the amount of product
obtained )/theoretical yield (the amount of product expected if the experiment hadbeen
performed perfectly)x 100
6. salicylic acid: phenolic hydroxyl group REACT
Benzene with hydroxyl (OH) =phenol group
carboxylic group
7. acetic anhydride: one of 2 carbonyl group REACT
O=C
8. aspirin: do not contain phenol group
carboxylic acid functional group and Ester group (change form phenol)
9. ferric chloride (qualitative test): What is the reagent used in the Phenol Testintense
red blue purple green
no color no phenol group NO
unreacted salicylic acid
10. melting point of a solid: the temperature at which both solid and liquid phasesof the
compound are in equilibrium
11. melting point range: compound begins to melt (liquid visible) to all the com-pound
is melted (all liquid)
12. what the melting point of a sample indicate?: it's pure or notrough
measure of the purity of a sample
13. impure sample: lower in temp
covers a greater melting point range than puresample
14. aspirin contain carboxylic acid group and react with: NaOH
15. aspirin and NaOH titration makes: carboxylate salt ans water
16. mass percentage (quantitative test): indication of purity of the aspirin sample
17. Erlenmeyer flask: used to hold liquids, has narrow neck to prevent splashes
1/2

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