Aspirin c9h8oh molar mass = 180.1g/mol can be prepared by the reaction of salicylic acid c7h603 molar mass = 13801 g/mol with acetic anhydride c6h603, according to the following equation. A chemist starts with 2 gram of salicylic acid reacts it with excess acetic anhydrate, suppose 1.50 grms of aspisrin are collected by filtration purification. What is the percent yield of aspirin?

The answer 58%

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To calculate the percent yield of aspirin, you need to compare the actual yield (1.50 grams) to the theoretical yield. The theoretical yield is the maximum amount of product that can be obtained based on the stoichiometry of the reaction.

To find the theoretical yield, you need to calculate the amount of aspirin that can be produced from the given amount of salicylic acid.

First, convert the mass of salicylic acid (2 grams) to moles by dividing by its molar mass (138.01 g/mol):

2 grams salicylic acid * (1 mol salicylic acid / 138.01 g salicylic acid) = 0.0145 mol salicylic acid

Next, use the balanced equation to determine the stoichiometric ratio between salicylic acid and aspirin. From the balanced equation, it can be seen that one mole of salicylic acid reacts with one mole of aspirin:

C₇H₆O₃ (salicylic acid) + C₆H₄(OH)COOH (acetic anhydride) → C₉H₈O₄ (aspirin) + C₂H₄O₂ (acetic acid)

Therefore, the theoretical yield of aspirin is equal to the moles of salicylic acid used in the reaction.

The molar mass of aspirin (C₉H₈O₄) is 180.16 g/mol. So, multiplying the moles of salicylic acid by the molar mass of aspirin will give you the theoretical yield in grams:

0.0145 mol salicylic acid * (180.16 g aspirin / 1 mol aspirin) = 2.61 grams aspirin (theoretical yield)

Now that we have the actual yield (1.50 grams) and the theoretical yield (2.61 grams), we can calculate the percent yield using the following formula:

Percent yield = (Actual yield / Theoretical yield) * 100

Percent yield = (1.50 g / 2.61 g) * 100 = 57.47%

Rounded to two decimal places, the percent yield of aspirin is approximately 57.47%. Thus, the answer is approximately 57%.