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# Aspirin is made by reacting salicylic acid with acetic anhydride in a 1:1:1 ratio. How many grams of aspirin are produce...

Aspirin is made by reacting salicylic acid with acetic anhydride in a 1:1:1 ratio. How many grams of aspirin are produced if 85.0 g of salicylic acid is reacted with excess acetic anhydride?

Aspirin is made by reacting salicylic acid with acetic anhydride in 1:1:1 ratio.

Acetic anhydride is present in excess.

Aspirin production is represented by the following reaction:  It is given 1 mole of salicylic acid reacts with 1 mole of acetic anhydride to produce 1 mole of aspirin.

The molecular weight of salicylic acid = 138.12 g/mol

The molecular weight of acetic anhydride = 102.9 g/mol

The molecular weight of aspirin = 180.16 g/mol

The weight of salicylic acid = 85 g

The number of moles of salicylic acid is calculated as follows:

Number of moles = given weight/molecular weight Where n represents the number of moles

Plugin the values in equation (2) The amount of aspirin required when 85 g of salicylic acid reacts with excess acetic anhydride is calculated as follows:

From the stoichiometry of the reaction, 1 mole of salicylic acid reacts with the 1 mole of acetic anhydride to produce 1 mole of aspirin.

For 1 mole of salicylic acid, aspirin produced 1 mole.

Therefore, for 0.615 moles of salicylic acid, aspirin produced 0.615 moles.

Number of moles of aspirin produced = 0.615 moles

The molecular weight of aspirin = 180.16 g/mol Plugin the values in equation (3) Therefore, the grams of aspirin produced = 110.79 g

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