Anonymous
Anonymous asked in Science & MathematicsChemistry · 4 weeks ago

You work for a chemical company and have been tasked with synthesizing acetylsalicylic acid. Currently, your R&D group can achieve a 27% yield for acetylsalicylic acid using salicylic acid and acetic anhydride. Your R&D group has been sent 2.86 U.S. tons of salicylic acid and 127 gallons of acetic anhydride. How much acetylsalicylic acid (in kg) can actually be produced by your group?

1 kg = 2.205 lbs

1 gal = 3.79L

Write answer to four significant figures.

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• 4 weeks ago

Mass of salicylic acid = 2.86 tons

1 ton = 907185 g

so mass of acid in g = 2.86 x 907185 = 2.5945 x 10^6 g

Mol salicylic acid = mass / molar mass

= 2.5945 x 106 g / 138.12 g/mol = 18784.7 mol

volume acetic anhydride = 127 gal = 4.8075x 10^5 mL

density acetic anhydride = 1.08 g/cm3

mass of acetic anhydride = density x volume

= 1.08 g/cm3 x 4.8075 x 10^5 mL

= 5.1921 x 10^5 g

mol acetic anhydride = 5.1921 x 10^5 g / 102.09 g/mol = 5085.8 mol

acetic anhydride is present in lesser amounts , so it is the limiting reactant

Number of mol of acetyl salicylic acid formed will be = 5085.8 mol

Theoretical yield = mol x molar mass

= 5085.8 mol x 180.16 g/mol

= 916253.8 g

= 916.25 kg

Now since percent yield = 55%

so actual yield = ( 55 x 2165 kg) / 100

= 1191 kg = 2626.155 Lbs