Question

In the lab calledd Synthesis of Aspirin, the mass of salicylic acid is 3.037g , the mass of dried Aspirin finally is 2.793.

What is the moles of salicylic acid used?

What is the moles of aspirin expected?

What is the mass of aspirin expected?

Answer 1

no of moles = weight / molar mass

moles of salicylic acid = 3.037 / 138.12 (molar mass taken from google)

= 0.022 moles

if you obswerve the reaction

one mole of  of salicylic acid will give one mole of Asprin

so moles of Asprin expected = moles of salicylic acid

= 0.022 moles Asprin expected

mass of aspirin expected = moles of Asprin expected / molar mas of Asprin

= 0.022 x 180.04

= .3.959 grams