Question

In: Chemistry

A student reacts 58g of salicylic acid with 10 mL of acetic anhydride producing 3.3g of...

A student reacts 58g of salicylic acid with 10 mL of acetic anhydride producing 3.3g of acetyl salicylic acid. What is the percent yield of the reaction?

Expert Solution

mass of salicylic acid = 58 g

mass of acetic anhydride = volume x density

= 10 x 1.08

= 10.8 g

reaction:

salicylic acid + acetic anhydride ------------------------> acetyl salicylic acid

138.12 g 102.09 g 180.16 g

58 g 10.8 g

138.12 g salicylic acid ---------------------> 102.09 acetic anhydride

58 g salicylic acid --------------------> 58 x 102.09 / 138.12 = 48.87 g acetic anhydride needed.

so it is lesser amount . limiting reaegnt is acetic anhydride

102.09 g acetic anhydride ---------------> 180.16 acetyl salicylic acid

10.8 g acetic anhydride = 180.16 x 10.8 / 102.09 = 19.1 g

thereotical yield = 19.1 g

actual yield = 3.3 g

percent yield = 3.3 x 100 / 19.1

= 17.3 %

queen_honey_blossom answered 1 year ago

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