Determination of aspirin

What is the primary goal of this experiment?

• To synthesize aspirin.

• To determine the melting point of aspirin.

• To determine the purity of an aspirin sample.

• To analyze the solubility of aspirin.

How many aspirin tablets were weighed for the experiment, and what was their approximate total mass?

• One tablet, approximately 0.6 grams.

• Two tablets, approximately 1.21 grams.

• Three tablets, approximately 1.8 grams.

• Four tablets, approximately 2.4 grams.

What type of reaction occurs when aspirin is heated with sodium hydroxide, and how many moles of sodium hydroxide react with one mole of aspirin?

• Neutralization; 1 mole of NaOH.

• Hydrolysis; 1 mole of NaOH.

• Neutralization and hydrolysis; 2 moles of NaOH.

• Esterification; 2 moles of NaOH.

After cooling, the reaction mixture is transferred to a volumetric flask and made up to what final volume?

• 100 mL

• 200 mL

• 250 mL

• 500 mL

What visual change indicates the endpoint of the titration?

• The solution changes from clear to pink.

• The solution changes from pink to clear.

• The solution changes from blue to red.

• The solution changes from red to blue.

What volume of sulfuric acid was used for the calculation of aspirin content?

• 14.0 cm³

• 15.0 cm³

• 13.3 cm³

• 28.3 cm³

What was the number of moles of sodium hydroxide that reacted with the aspirin?

• 0.025 mol

• 0.0133 mol

• 0.0117 mol

• 6.65 x 10⁻⁴ mol

What was the calculated mass of aspirin in one tablet?

• 1.053 g

• 0.5265 g

• 300 mg

• 5.85 x 10⁻³ mol