Saturday
April 19, 2014

Search: (a) What mass of acetic anhydride is needed to completely consume 2.60 102 g salicylic acid?

Number of results: 51,640

Chemestry
Aspirin (C9H8O4) is synthesized by reacting salicylic acid (C7H6O3) with acetic anhydride (C4H6O3). The balanced equation is given below. C7H6O3 + C4H6O3 C9H8O4 + HC2H3O2 (a) What mass of acetic anhydride is needed to completely consume 4.20 102 g salicylic acid? g (b) What is...
Thursday, February 2, 2012 at 10:02pm by Jocelyn

AP Chemistry
Aspirin (C9H8O4) is synthesized by reacting salicylic acid (C7H6O3) with acetic anhydride (C4H6O3). The balanced equation is given below. C7H6O3 + C4H6O3 C9H8O4 + HC2H3O2 (a) What mass of acetic anhydride is needed to completely consume 4.40 102 g salicylic acid? What is the ...
Monday, August 30, 2010 at 5:36pm by BB

chemistry
given the density of acetic anhydride to be 1.05 g/mL, what was the mass of the acetic anhydride added to the reaction? How many moles of acetic acid were added?
Tuesday, March 29, 2011 at 8:44pm by kendalyn

chemistry
For the theoretical yield, I used the mass of acetic anhydride. Was I supposed to use the mass of salicylic acid (which was 2.00 g) instead? acetic anhydride + salicylic acid ---> acetic acid +acetylsalicylic acid
Wednesday, April 4, 2012 at 3:11pm by casey

chemistry
C7H6O3 (s) + C4H6O3 (l) -> C9H8O4 (s) + C2H4O2 (l) molar masses: salicylic acid, C7H6O3 = 138.12 g/mol acetic anhydride, C4H6O3 = 102.09 g/mol Asprin, C9H8O4 = 180.157 g/mol For this problem calculate the moles of aspirin obtained from 45.0 g. This represents an 85.0% yield...
Wednesday, October 18, 2006 at 7:25pm by Anonymous

chemistry
You must first determine which is the limiting reagent; i.e., salicylic acid or acetic anhydride. And you need the density of acetic anhydride to do that. mols salicylic acid = grams/molar mass = ? mols acetic anhydride = grams/molar mass. grams you get by grams = volume x ...
Friday, June 1, 2012 at 7:43am by DrBob222

chemistry
Aspirin (C9H8O4) is synthesized by reacting salicylic acid (C7H6O3) with acetic anhydride (C4H6O3). The balanced equation is given below. C7H6O3 + C4H6O3 C9H8O4 + HC2H3O2 What mass of acetic anhydride is needed to completely consume 3.60 x 10^2 g salicylic acid? i worked out ...
Friday, January 23, 2009 at 7:52pm by lyne

chemistry - synthesis of aspirin
This is an experiment for a synthesis of aspirin lab mass of salicylic acid = 2.005 g mass of acetic acid = ? moles of acetic acid = ? volume of acetic anhydride = 4 ml mass of acetic anhydride (Use 1.08 g/ml for the liquid density) = (1.08 g/ml) (4 ml) = 4.32 g moles of ...
Saturday, April 7, 2012 at 8:32pm by Priscilla

chemistry - synthesis of aspirin
I wanted to calculate the theoretical and actual yield of aspirin. mass of salicylic acid = 2.005 g But isn't salicylic acid differ. from acetic acid? If so, how do we find the mass of acetic acid in this experiment volume of acetic anhydride = 4 ml mass of acetic anhydride (...
Friday, April 6, 2012 at 4:23pm by Priscilla

Chemistry
Two people were given 1.75 g salicylic acid and 2.00 mL of acetic anhydride. If the density of acetic anhydride is 1.0820 g/mL, how many grams of aspirin could they have prepared. Is the answer 4.7 g
Friday, November 14, 2008 at 11:42pm by George

Chemistry
Aspirin, C9H8O4, is produced through the following reaction of salicylic acid, C7H6O3, and acetic anhydride, C4H6O3: C7H6O3(s) + C4H6O3(l) → C9H8O4(s) + HC2H3O2(l). a.) What mass of aspirin (in kg) could be produced from 75.0 mol of salicylic acid? b.) What mass of ...
Thursday, February 19, 2009 at 8:52pm by Emat

chemistry - synthesis of aspirin
wanted to calculate the theoretical and actual yield of aspirin. mass of salicylic acid = 2.005 g But isn't salicylic acid differ. from acetic acid? If so, how do we find the mass of acetic acid in this experiment volume of acetic anhydride = 4 ml mass of acetic anhydride (...
Saturday, April 7, 2012 at 1:31pm by Priscilla

O Chemistry
In the reaction p-aminophenol + acetic anhydride --> acetaminophen , 4.5 ml of water is added into the flask with the p-aminophenol and acetic anhydride at the beginning of the experiment. What is the purpose of this water?
Sunday, April 4, 2010 at 12:42am by Tammy

Chemistry
Aspirin, C9H8O4 , is produced through the following reaction of salicylic acid, C7H6O3, and acetic anhydride, C4H6O3: C7H6O3(s) + C4H6O3(l) ---> C9H8O4(s) + HC2H3O2(l) A. What mass of aspirin (kg) could be produced from 75.0 mol of salicylic acid? B. What mass of acetic ...
Wednesday, February 5, 2014 at 10:39am by Amber

chemistry
If you used 0.155 mL of acetic anhydride, and 0.169 g of p-aminophenol what was the limiting reagent? Choice is either: 1. acetic anhydride or 2. p-aminophenol ________mol? How many moles of the non-limiting reageant remained after the reaction was complete?
Wednesday, October 19, 2011 at 1:47am by ej

chemistry
Have you written the equation? It is a 1:1 reaction (1 mole SA and 1 mole acetic anhydride produces 1 mole aspirin). Convert 1.5 g SA to moles. mols = grams/molar mass. Convert 4 mL acetic anhydride to grams (using density), then to moles. Convert moles SA to moles product (...
Monday, April 19, 2010 at 5:23pm by DrBob222

chemistry - synthesis of aspirin
I checked your values for mols aspirin and it looks good except I would carry it out one more place. You have 3 significant figures in all of the other numbers (if the 4 mL is 4.00 mL); therefore, you can have 3 in the 0.012 number. Same for mols acetic anhydride; again I'm ...
Saturday, April 7, 2012 at 8:32pm by DrBob222

Chemistry
You don't have enough information in the post to answer the question. I assume this is an aspirin problem and you're starting with acetic anhydride and salicylic acid and you want to know how much acetic acid is produced then calculate the volume from the mass. Assuming you ...
Monday, February 6, 2012 at 11:49pm by DrBob222

chemistry
How many grams of acetic anhydride are needed to react with 3.25 of salicylic acid?
Thursday, August 26, 2010 at 6:36pm by Anonymous

Chemisty
How to calculate teh 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? ( Molar masses: acetic anhydride = 102.1 g/mol; salicylic acid = 138.2 g/mol)
Wednesday, January 6, 2010 at 11:54pm by Kerrie

chemistry - synthesis of aspirin
wait, I just have one quick question. I realized the equation for this experiment would be C7H6O3 + C4H6O3 ----> C9H8O4 + C2H4O2 BUT... acetic acid's formula is C2H402 in molecular formula. Is the above equation right? Also, I realized after mixing salicylic acid and acetic...
Friday, April 6, 2012 at 4:23pm by Priscilla

chemistry
Ask your teacher or instructor for a chemistry supplies catalog. The catalog will give you the prices. If you are using salicylic acid and acetic anhydride as the reactants, it would be far more convenient to use an excess of acetic anhydride, a liquid, since the unreacted ...
Friday, November 21, 2008 at 9:10pm by GK

Chemistry
Aspirin is prepared by heating salicylic acid, C7H6O3, with acetic anhydride, C4H603. The other product produced is acetic acid, C2H402. C7H6O3+C4H6)3->C9H8O4+C2H4O2 What is the theoretical yield in grams of aspirin, C9H8O4, when 2.00 grams of salicylic acid is heated with ...
Tuesday, November 6, 2012 at 8:00pm by Lauren

chemistry
Write and balance the equation; however I think the ratio is 1:1 for reactants and products. When amounts are given for both reactants you know it is a limiting reagent problem. mols salicylic acid = grams/molar mass Look up the density of acetic anhydride and determine grams ...
Sunday, January 27, 2013 at 8:14pm by DrBob222

chemistry
Is it possible to make acetic anhydride from acetic acid/glacial?
Saturday, September 24, 2011 at 10:30am by irfan

chemistry
Asprin, C9H8O4, is prepared by reacting salicylic acid, C7H6O3, with acetic anhydride, C4H6O3, in the reaction C7H6O3(s) + C4H6O3(l) -> C9H8O4(s) + C2H4O2(l) A student is told to prepare 45.0 g of aspirin. She is also told to use a 55.0% excess of the acetic anhydride and ...
Wednesday, October 18, 2006 at 7:25pm by Chris

O Chemistry
Do you suppose it converts the acetic anhydride to acetic acid?
Sunday, April 4, 2010 at 12:42am by DrBob222

Chemistry
Note that 1 mol SA = 1 mol aspirin and 1 mol SA = 1 mol acetic anhydride. Therefore, 75 mol SA will produce 75 mols aspirin. Then g aspirin = mols x molar mass. 75 mol SA will use 75 mol acetic anhydride; g = mols x molar mass.
Wednesday, February 5, 2014 at 10:39am by DrBob222

chemistry - synthesis of aspirin
1 mol acetic anhydride + 1 mol salicylic acid = 1 mol aspirin I don't know the formulas (I could look them up but you probably have them) but the above tells you what you want to know. It's a 1:1 ratio throughout. You will need to calculate the mols salicylic acid and mols ...
Friday, April 6, 2012 at 4:23pm by DrBob222

chem
Convert 14 g salicylic acid to moles. Moles = grams/molar mass. Convert 8.5 g acetic anhydride to moles the same way. Since this is a 1:1 ratio, the moles of salicylic acid will be the same as the moles of aspirin produced. Next, since this is a 1:1 ratio, the moles of acetic ...
Tuesday, September 1, 2009 at 3:51pm by DrBob222

chemistry
P2O5 is the anhydride of H3PO4. As2O5 is the anhydride of H3AsO4. N2O5 is the anhydride of HNO3. SnO2 is the anhydride of Sn(OH)4 BaO is the anhydride of Ba(OH)2 You know which are strong acids or bases; therefore, those go at the top (for weakest acid) to bottom (for ...
Sunday, November 25, 2012 at 5:17pm by DrBob222

CHEM HELP
I asked this already but for some reason the answer I got isnt being accepted online Question: 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 + ...
Tuesday, November 27, 2012 at 1:34am by Yaw

chemistry
mols acetic anhydride = grams/molar mass g acetylsalicylic acid = mols x molar mass.
Wednesday, April 4, 2012 at 3:08pm by DrBob222

chem
Aspirin (C9H8O4) is produced from salicylic acid (C7H6O3), and acetic anhydride (C4H6O3): C7H6O3 + C4H6O3 C9H8O4 + HC2H3O2 . (c) What is the theoretical yield of aspirin if 189 kg of salicylic acid is allowed to react with 128 kg of acetic anhydride? (d) If the situation ...
Sunday, October 7, 2012 at 8:12pm by rebekah

chemistry (Pls Bob check for me)
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, ...
Sunday, April 28, 2013 at 2:28pm by Fai

chemistry
Molar mass of salicylic acid: C6H4(OH)CO2H = 138.12074 g/mol acetic anhydride: Molecular formula, C4H6O3. Molar mass, 102.09 g/mol You should be able to take it from there.
Friday, February 24, 2012 at 8:46am by Steve

Chem(check my work, mass percent acetic acid)
I do believe this is the right annswer (.11g Acetic Acid present). When you you use the above equation for the mass percent of acetic acid (g CH3COOH/g sample) you end up with 4.3% Acetic Acid. That is a normal concentration of acetic acid [I looked at other sites for ...
Monday, June 12, 2006 at 1:20pm by BRAD

chemistry
1. When performing this experiment, a student mistakenly used impure KHP to standardize the NaOH solution. If the impurity is neither acidic nor basic, will the percent by mass of acetic acid in the vinegar solution determined by the student be too high or too low? Justify ...
Sunday, March 23, 2014 at 3:05pm by anonymous

Chemistry
In this experiment NaOH is standardized to find out the percent by mass of the acetic acid in a sample of vinegar. A student had not allowed the NaOH pellets to dissolve completely before standardizing it with KHP, but when the student refilled the buret with NaOH to titrate ...
Saturday, March 29, 2014 at 12:32pm by Sandy

chemistry
how'd you get 1.55g acetic anhydride?
Wednesday, October 18, 2006 at 7:25pm by Anonymous

Chemistry
ASpirin, c9h8o4, is prepared by reating salicylic acid, c7h6o3, with acetic anhydride, c4h6o3, in the reaction. c7h6o3 + c4h6o3---> c9h8o4 + c2h4o2 A student is told to prepare 45.0 g of aspirin. she is also told to use a 55.0 % excess of acetic anhydride and to expect to ...
Monday, September 22, 2008 at 11:06pm by Komal

Chemistry
SA = salicylic acid AH = acetic anhydride SA + AH ==> acetic acid + ASA(aspirin) mols SA = 2.489/molar mass SA. Convert to mols ASA. mols ASA = mols SA g ASA = mols ASA x molar mass ASA (this is the theoretical yield).
Tuesday, February 12, 2013 at 2:35pm by DrBob222

Chem
Please tell me if these are right! 1.How many milliliters of 0.215 M NaOH solution are needed to completely neutralize 2.50 ml of 0.825 M H2SO4 solution? I got 19.2 ml 2. A 10.0-ml sample of vinegar which is an aqueous solution of acetic acid HC2G3O2 requires 16.5 ml of 0.500M...
Monday, December 6, 2010 at 9:17pm by Jessica

Chemisty
Most of these stoichiometry problems are worked the same way. This problem is a limiting reagent problem and stoichiometry rolled into one. 1. Write and balance the equation. 2. Convert g salicylic acid to moles. Moles = grams/molar mass. Convert 5.0 mL acetic anhydride (using...
Wednesday, January 6, 2010 at 11:54pm by DrBob222

chemistry - synthesis of aspirin
Yes, what you've written is right. Why are you worrying about acetic acid? That's a product but you want theoretical yield of aspirin so how much acetic acid is produced is of no interest. If you wanted theoretical yield of acetic acid we would be interested in that but ...
Saturday, April 7, 2012 at 1:31pm by DrBob222

Chemistry
1. Isolation of aniline by steam distillation. (a) Why is NaOH added before performing thedistillation? (b) Suggest a reason for the milky appearance of the distillate and for the change in appearance upon addition of HCl. After having isolated the reduction product, aniline, ...
Thursday, October 19, 2006 at 8:58pm by Lindz

Chem Lab
This is a limiting reagent problem and you don't have enough information to work the problem. You have 3.5 mL acetic anhydride and you need to convert that to mols. You need the density of the acetic anhydride to convert 3.5 mL to grams. Here is a site that will show you how ...
Friday, November 2, 2012 at 12:52am by DrBob222

Chemistry
Asprin, c9h804, is produced through the following reaction of salicyclic acid, c7h6o3, and acetic anhydride, c4h6o3. chemical equation: c7h6o3 + c4h6o3 yields c9h8o4 + hc2h3o2 (all numbers in this equation are subscripts) At 20 degrees Celsius. how many liters of acetic acid, ...
Sunday, January 21, 2007 at 2:18am by Steph

Law
looking to ascertain what the liquid volume of 5 gallons of acetic anhydride is in pounds.
Monday, April 25, 2011 at 6:24am by kevin

chem
Aspirin, C9H8O4, is produced from salicylic acid, C7H6O3, and acetic anhydride, C4H6O3: C7H6O3 + C4H6O3 --> C9H8O4 + HC2H3O2 a. How much salicylic acid is required to produce 1.5 x 10^2 kg of aspirin, assuming that all of the salicylic acid is converted to aspirin? b. how ...
Friday, August 17, 2012 at 1:39pm by greeny

chemistry
I need some help with calculating percent yield and percent purity of aspirin. Here's my data (questions follow): SYNTHESIS Mass of salicylic acid.., 2.0 g Volume of acetic anhydride.., 5 mL Mass of watch glass.., 22.10 g Mass of aspirin and watch glass.., 28.01 g Mass of ...
Saturday, March 24, 2007 at 11:33am by Jim

chemistry 30a
1. Write the equation and balance it. 2. Use PV = nRT and solve for n = moles CO2. 3. Using the equation #1, convert mols CO2 to moles acetic acid . 4. Convert mols acetic aci to grams. g = moles x molar mass. 5. With grams acetic acid you can go to the solution you have. 6. ...
Monday, March 12, 2012 at 9:14pm by DrBob222

Chemistry
A chemist wants to be a supercook and wants to create 8%(m/v) acetic acud solution to be "extra strength" vinegar. if pure acetic acid Is a liquid density of 1.049 g/ml. how many ml of acetic acid should be dissolved to male 500 ml of 8% acetic acid? Calculate grams of acetic ...
Sunday, April 22, 2012 at 9:43am by Kate

Chemistry
Asprin C9H8O4 is made by the reaction of salicylic acid C7H6O3 and acetic anhydride C4H6O3. The other product in the reaction is acetic acid HC2H3O2. How many of each reactant should be used to produce 75.0g of asprin. Assume that the reaction gives a 68.2% yield.
Wednesday, October 8, 2008 at 8:40pm by Mookie

chemistry
density = 1.0187 g/mL. mass 1000 mL = 1.0187 x 1000 mL = ?? How much of that is acetic acid? 15%; therefore, ?? x 0.15 = mass acetic acid = xx. How many mols is that? xx g acetic acid/molar mass acetic acid = yy Molarity = yymols/L = yy M. molality = mols solute/kg solvent ...
Monday, February 11, 2008 at 9:01pm by DrBob222

chemistry
what mass of baking soda would completely react with 3.8 g acetic acid
Wednesday, April 17, 2013 at 10:41pm by Sreve

Chemistry
What is the theoretical yield of aspirin if you have 2g of salicylic acid and 5 ml acetic anhydride?
Tuesday, April 19, 2011 at 12:18am by N/A

Chemistry
a. 75 mol of salicylic acid will product 75.0 mol aspirin since 1 mol of salicylic acid produces 1 mol aspirin. Then grams = mols x molar mass. b. You know 75.0 mol salicylic acid will require 75.0 mol acetic anhydride. g = mols x molar mass. c. 75.0 moles salicylic acid will ...
Thursday, February 19, 2009 at 8:52pm by DrBob222

Chemistry
Writ the equation for salicylic acid + acetic anhydride to produce ASA. This is a limiting reagent problem. 2a. Convert 2.0 g salicylic acid to mols. 2b. convert 5.0 mL to grams by density, then to mols. 3. Convert to mols ASA (aspirin) a. Convert mols salicylic acid to mols ...
Sunday, April 20, 2008 at 5:53pm by DrBob222

chemistry - synthesis of aspirin
No. Mass of acetic acid = mols acetic acid x molar mass acetic acid and that is the theoretical yield of acetic acid in grams. I don't know the exact instructions you have but if I were asked to calculate grams acetic acid produced I would do as above then multiply by the ...
Saturday, April 7, 2012 at 8:32pm by DrBob222

Chemistry. Please help
Use the Henderson-Hasselbalch equation. pH = pKa + log(B/A) 5.00 = 4.76 + log(100.82)/x Solve for x = mols acetic acid needed. Then calculate mL of the 17.3 M acetic acid needed to produce that many mols for 1 L. Note:I'm a little confused by the problem. I suppose one could ...
Monday, September 10, 2012 at 8:33am by DrBob222

chemistry lab
if you find salicylic acid or acetic anhydride in your aspirin synthesis product why are they there? Where did they come from?
Sunday, March 20, 2011 at 9:48pm by annonymous

chemistry
What is the formula for predicting the grams of Aspirin produced from reacting Salicylic Acid and Acetic Anhydride?
Tuesday, November 5, 2013 at 10:37pm by Courtney

chemistry
What is the formula for predicting the grams of Aspirin produced from reacting Salicylic Acid and Acetic Anhydride?
Tuesday, November 5, 2013 at 10:37pm by Courtney

chemistry
2 C7H6O3 + 1 C4H6O3 -> 2 C9H8O4 + H2O 45.0 g / 0.85 = 52.9 g theoretical yield. 52.9 g C9H8O4 x (1 mole / 180.2g) = 0.294 moles aspirin 0.294 moles aspirin x (2 moles C7H6O3 / 2 moles aspirin) x (138.1 g C7H6O3 / mole C7H6O3) = 40.6 g salicylic acid. 0.294 moles aspirin x (...
Wednesday, October 18, 2006 at 7:25pm by Anonymous

Chemistry
CO2 + H2O ==> H2CO3 (carbonic acid). Know what CO2 dissolved in water (to make carbonated drinks) contains? H2CO3. So CO2 is the anhydride of H2CO3. SO2 is the anhydride of H2SO3. SO3 is the anhydride of H2SO4. N2O5 is the anhydride of HNO3. (The anhydride of HNO3 is NOT ...
Sunday, May 31, 2009 at 7:21pm by DrBob222

Chemistry
what is the theoretical yield in grams of aspirin if 2.04g of salicycli acid reacts with an excess of acetic anhydride ?
Monday, September 26, 2011 at 7:31pm by Kay

Chem
The density of ethanoic anhydride is 1.092 g/mL. Use this value, and the amount that you used in the laboratory to show that ethanoic anhydride is in excess for your preparation of ASA?, 2.5ml of ethanoic anhydride was used.
Friday, March 14, 2014 at 3:03pm by Dan

Chemistry
If 2 g of salicylic acid is heated with 4 g of acetic anhydride, what is the theoretical yield ? C7H6O3 + C4H6O3 --> C9H8O4 + C2H4O3
Saturday, April 17, 2010 at 10:45pm by Fiona

ChEMISTRY (Help please)
Calculate the mass percent of acetic acid in acetic acid solution. Average molarity= .8806753M Average density= 3.27463 Molar mass of acetic acid= 60.042g
Tuesday, April 13, 2010 at 8:02pm by Michelle

Chemistry
8% m/v means 8 g acetic acid/100 mL soln. You want 500 mL soln so you want 5*8 = 40 g acetic acid. volume = mass/density. You know mass and density, solve for volume needed for 40 grams
Sunday, April 22, 2012 at 9:43am by DrBob222

Chemistry help!!
A chemist wants to be a supercook and wants to create 8%(m/v) acetic acud solution to be "extra strength" vinegar. if pure acetic acid Is a liquid density of 1.049 g/ml. how many ml of acetic acid should be dissolved to male 500 ml of 8% acetic acid? It says to first calculate...
Sunday, April 22, 2012 at 12:42pm by Kate

chemistry
The molar mass of acetic acid is 24+4+32=60 Then, There is 0.201 mol acetic acid per litre or 0.201*60=12.06g of acetic acid The density is 1g/ml to change to g/l it becomes 1000g/l then the solution is 1000g to know the mass of the water substract mass of the acetic acid from...
Tuesday, December 7, 2010 at 12:07pm by Redae

chemistry
The molar mass of acetic acid is 24+4+32=60 Then, There is 0.201 mol acetic acid per litre or 0.201*60=12.06g of acetic acid The density is 1g/ml to change to g/l it becomes 1000g/l then the solution is 1000g to know the mass of the water substract mass of the acetic acid from...
Tuesday, December 7, 2010 at 12:07pm by Redae

Chem Lab
Aspirin synthesis and Analysis: Calculate theoretical yield of ASA? Used 3.5mL of acetic anhydride and 1.5g of salicylic acid.
Friday, November 2, 2012 at 12:52am by Cris

chemistry
Prepare 500mL of a 0.200 M acetate buffer at pH 4.90 using only pure acetic acid, 3M NaOH, and water. 1) Add acetic acid to ~400mL of water in a 500 mL beaker. How many grams of acetic acid are needed? 2)Add 3 M NaOH solution until pH is 4.90. What volume of NaOH is needed? (...
Monday, September 5, 2011 at 11:58am by Ryn

chemistry
A certain vinegar is 5.0% acetic acid in water. What mass (in grams) of acetic acid is needed to mix with 185 grams of water to prepare this vinegar?
Wednesday, April 28, 2010 at 12:19pm by Anonymous

chemistry
A solution is 40% acetic acid by mass. The density of this solution is 1.049 g/mL. Calculate the mass of pure acetic acid in 170 mL of this solution at 20 C. Answer in units of g The density of a solution of sulfuric acid is 1.29 g/cm3 and it is 38.1% acid by mass. What volume...
Monday, September 2, 2013 at 6:56pm by K

Chemistry help!!
mass needed: 500ml*.08, and assuming the 8 percent is the same density as water, then that is 40 grams acetic acid. volume needed=massneeded/density=40/1.049 ml
Sunday, April 22, 2012 at 12:42pm by bobpursley

chemistry
if 1.5g of salicylic acid is heated with an excess of acetic anhydride, what is the theoretical yield of acetylsalicylic acid?
Tuesday, January 4, 2011 at 8:17pm by kelis

Chemistry
No. (C2H3O2^-) = moles/L Moles comes from the acetic acid titrated COMPLETELY to the equivalence point. So M x L = moles acetic acid. If all of that is converted to acetate, as it should be, then M x L/final volume = (acetate). Two sources of error. The molarity of the acetic ...
Sunday, May 9, 2010 at 2:11am by DrBob222

chemistry
#2 is the incorrect one. SO2 is the anhydride of H2SO3; SO3 is the anhydride of H2SO4.
Monday, October 1, 2012 at 8:18pm by DrBob222

Chemistry
Do you have a density? 0.67275 M = 0.67275 moles acetic acid/L soln. That is 0.67275 moles x molar mass acetic acid = grams acetic acid = ?? mass = volume x density; convert g acetic acid to volume acetic acid. And that is mL acetic acid/1000 mL soln. Convert that to mL acetic...
Monday, October 25, 2010 at 5:12pm by DrBob222

chemistry
Assume you used 0.200g of salicylic acid and 0.480mL of acetic anhydride, and you obtain 0.152g of pure, recrystallized, dry aspirin. Calculate the percent yield.
Sunday, January 27, 2013 at 8:14pm by Mec

chemistry
Calculate the number of moles in each of the following: 0.150 g of salicylic acid 0.30 mL of acetic anhydride (density = 1.08 g/mL)
Friday, February 24, 2012 at 8:46am by Pat

Chemistry
I think the % acetic acid will be too high. Standardization step: mols KHP = grams KHP/molar mass KHP mols NaOH = mols KHP M NaOH = mols NaOH/L NaOH Titration vinegar step: mols NaOH titrant = M x L mols acetic acid = mols NaOH g acetic acid = mols acetic acid x molar mass % ...
Friday, March 28, 2014 at 10:32pm by DrBob222

chemistry
2. When preparing a NaOH solution, a student did not allow the NaOH pellets to completely dissolve before standardizing the solution with KHP. However, by the time the student refilled the buret with NaOH to titrate the acetic acid, the remaining NaOH pellets had ...
Monday, March 24, 2014 at 7:50am by anonymous

chemistry
Assuming NaHCO3 is the active ingredient in Alka-Seltzer that would react with vinegar, 2NaHCO3 + 2HC2H3O2(vinegar) ==> 2NaC2H3O2 + 2CO2 + 2H2O Convert grams CO2 to moles CO2. moles = grams/molar mass. Using the coefficients in the balanced equation, convert moles CO2 to ...
Monday, March 22, 2010 at 7:49pm by DrBob222

Chemistry
What is the concentration of an acetic acid solution if 11.2 mL of 1.002 Molarity sodium hydroxide solution is needed to completely neutralize 5.1 mL of the acid?
Wednesday, March 23, 2011 at 11:27pm by Bruce

chemistry
If you use 1 gram of salacylic acid and 3ml of acetic anhydride & 3 drops of phosphoric acid and 1 ml of water after boiling = 0.55 g of aspirin. What is the % yield?
Friday, June 1, 2012 at 7:43am by rachel

Chemistry
If 0.150 moles of salicylic acid and execs acetic anhydride are used during a synthesis of aspirin, how many grams of aspirin will be obtained if the reaction gives a 38% yield?
Saturday, April 28, 2012 at 2:20pm by Tiffany

MATH
Calculate the amount of 8% acetic acid needed to combine with water to make 600 ml of 3.5% acetic acid.
Friday, July 6, 2012 at 10:11am by Brittany

chemistry
calculate the volume of 17 M concentrated acetic acid solution that is needed to prepare 100 cubic centimeter of 1 M acetic acid?
Tuesday, September 20, 2011 at 11:55pm by mylene

chemistry
calculate the volume of 17 M concentrated acetic acid solution that is needed to prepare 100 cubic centimeter of 1 M acetic acid?
Tuesday, September 20, 2011 at 11:56pm by mylene

Ochem
In the reaction between p-aminophenol and acetic anhydride to form acetaminophen, what was the purpose of adding water to the reaction mixture? There are a couple of possible answers, and this requires a detailed explanation for credit. thanks!
Saturday, March 10, 2012 at 12:50am by chi

Gen CHEM 2
If you posted your work I could have already found the error and posted it. pH = pKa + log (base/acid) 5.28 = 4.74 + (acetate/10). solve for base which will be in millimols. millimols sodium acetate = M x mL. You know millimols, you know mL of acetic acid, calculate M. Then, ...
Monday, February 11, 2008 at 9:42pm by DrBob222

chemistry
what mass of water is needed to completely react with 2.35g of Ca
Sunday, November 1, 2009 at 2:49pm by nathalia

chemistry
what mass of iron is needed to react completely with 16 g of sulfur?
Tuesday, November 10, 2009 at 1:37pm by mkh

college Chemistry
what mass of H 2 O is needed to completely react with 5.10g SiCl4
Tuesday, December 7, 2010 at 1:13am by CHAZ

chemistry
You want to make an acetic acid/acetate buffer, pH 3.8, with a volume of 250 mL, and a final concentration of ([AcOH] + [AcO-]) = 0.1 M. You may only use acetic acid and sodium acetate (no strong acid or base). How many mL of glacial acetic acid would be needed (d = 1.05 g/mL)?
Saturday, March 7, 2009 at 11:44pm by Anonymous

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