March 31, 2015

Homework Help: CHEM HELP

Posted by Yaw on Tuesday, November 27, 2012 at 1:34am.

I asked this already but for some reason the answer I got isnt being accepted online
In the laboratory, 3.50 grams of salicylic acid were reacted with 7.20 ml of acetic anhydride (density equal to 1.08 g/ml). Determine the limiting reagent.

I did:
salicylic acid + acetic anhydride → acetyl salicylic acid + acetic acid
moles C6H4(OH)COOH = (mass C6H4(OH)COOH) / (mole mass C6H4(OH)COOH)
moles C6H4(OH)COOH = (3.50 g) / (138.12354 g/mol)
moles C6H4(OH)COOH = 0.025396 mol
density (CH3CO)2O = [mass (CH3CO)2O] / [volume (CH3CO)2O]
mass (CH3CO)2O = [density (CH3CO)2O][volume (CH3CO)2O]
mass (CH3CO)2O = [1.08 g/mL][7.20 mL]
mass (CH3CO)2O = 7.776 g
moles (CH3CO)2O = [mass (CH3CO)2O] / [mole mass (CH3CO)2O]
moles (CH3CO)2O = [7.776 g] / [102.09024 g/mL]
moles (CH3CO)2O = 0.0761679 mol

So the answer would be salycic acid b/c its the lower number 0.025 mol

BUT my answer is incorrect apparently. Is here something I did wrong?

Answer this Question

First Name:
School Subject:

Related Questions

CHEMISTRY-Explanation Please - In the laboratory, 3.50 grams of salicylic acid ...
chem - Aspirin, C9H8O4, is produced from salicylic acid, C7H6O3, and acetic ...
Chemistry - Two people were given 1.75 g salicylic acid and 2.00 mL of acetic ...
Chemistry - Aspirin is prepared by heating salicylic acid, C7H6O3, with acetic ...
chemistry - For the theoretical yield, I used the mass of acetic anhydride. Was ...
Chemisty - How to calculate teh theoretical yield of aspirin to be obtained ...
chem - if you were to react 14.00 grams of salicylic acid with 8.50 grams of ...
chem - Aspirin (C9H8O4) is produced from salicylic acid (C7H6O3), and acetic ...
chemistry - Aspirin (C9H8O4) is synthesized by reacting salicylic acid (C7H6O3) ...
chemistry - synthesis of aspirin - wanted to calculate the theoretical and ...