Calculate the theoretical yield of aspirin to be obtained when 2.0 g of salicylic acid and 5.0 ml of acetic anhydride (density = 1.08 g/ml) are mixed together. what is the limiting reagent?

The theoretical yield is 2.61 grams of aspirin

salicylic acid is the limiting reactant.

Explanation:

Step 1: Data given

Mass of salicylic acid = 2.0 grams

Volume of acetic acid = 5.0 mL

Density of acetic acid = 1.08 g/mL

Molar mass of acetic anhydride = 102.09 g/mol

Molar mass of salicylic acid = 138.12 g/mol

Step 2: The balanced equation

C7H6O3 + C4H6O3 → C9H8O4 + CH3COOH

Step 3: Calculate mass of acetic acid

Mass acid acid = density * volume

Mass acetic acid = 1.08 g/mL * 5.0 mL

Mass acetic acid = 5.5 grams

Step 4: Calculate moles salicylic acid

Moles salicylic acid = mass salicylic acid / molar mass salicylic acid

Moles salicylic acid = 2.00 grams / 138.12 g/mol

Moles salicylic acid = 0.0145 moles

Step 5: Calculate moles acetic anhydride

Moles acetic anhydride= 5.5 grams / 102.09 g/mol

Moles acetic anhydride = 0.0538 moles

Step 6: Calculate the limiting reactant

For 1 mol salicylic acid we need 1 mol acetic anhydride to produce 1 mol aspirine.

The limiting reactant is salicylic acid. It will completely be consumed. (0.0145 moles). Acetic anhydride will be in excess. There will react 0.0145 moles . There will remain 0.0538 - 0.0145 = 0.0393 moles

Step 7: Calculate moles aspirine

For 1 mol salicylic acid we need 1 mol acetic anhydride to produce 1 mol aspirine.

For 0.0145 moles salicylic acid, we'll have 0.0145 moles aspirine

Step 8: Calculate mass of aspirin

Mass aspirin = moles aspirin * molar mass aspirin

Mass aspirin = 0.0145 moles * 180.158 g/mol

Mass aspirin = 2.61 grams = Theoretical yield

The theoretical yield is 2.61 grams of aspirin

salicylic acid is the limiting reactant.

when—without warning—something provokes your anger, you may struggle not to succumb to it. since what typically makes you mad is feeling powerless in the face of what seems unfair, your anger is mostly an attempt at a “quick fix” to right the balance. it’s as though you’re raising a fist in protest, proclaiming that you’re not going to capitulate to such injustice.

there are, however, a multitude of problems related to this immediate, push-back reaction of anger. and probably the key one is that almost never does it resolve the issue that gave rise to it. such reactive anger is probably best understood as self-defeating. as david burns, the author of the seminal self- book feeling good, observes: if realistically, acting on your anger is to make any sense, it needs to meet two criteria—which, in almost every case, is frankly impossible. that is, your anger must:

be directed toward a person who has intentionally (and needlessly) behaved in a hurtful way toward you; and

be beneficial or advantageous to you (i.e., assist you in achieving a desired goal).

i think you’ll agree that only rarely can you claim that your anger is both warranted and , whether to yourself or the relationship.

so let me offer you a two-step alternative to abandoning your better judgment and giving in to the temptation of anger—one that should neutralize your anger in seconds. or, when you’re really angry, in minutes.

but keep in mind that you must really want to execute these steps, be sufficiently motivated to perform them. which means overcoming more unconscious resistance than you might ever have imagined. because there are many immediate “advantages” of anger that can interfere with your resolve, i’ll suggest a few of them that might interfere with your employing this powerful method to rid yourself of counter-productive anger.

explanation: