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Must watch a 12-minute video to complete the assignment. please answer all questions on the report form. simple and should take no longer than 30 minutes. please show work when applicable.

LABORATORY 8
Name: __________________ Date: ___________
Section: __________
Instructor:
REPORT FORM
Experimental Data
Mass of Salicylic Acid Used
Mass of Watch Glass
Mass of Watch Glass+ Aspirin Obtained
Mass of Aspirin Obtained
Theoretical Yield Calculated Based on Salicylic Acid Used
Calculation:
Percent Yield
Calculation:
Part I. Synthesis of Aspirin
Detailed Observations:
Part II. Formation of Methyl Salicylate
Detailed Observations:
Results and Discussion
A. Many aspirin tablets are formulated to contain 325 mg of aspirin. How many kilograms of aspirin
would be required to make 1000 aspirin tablets?
B. The toxicity of chemical compounds is often expressed as LD50, the amount of material which,
when ingested, will kill half of the test animals. Oil of wintergreen is used in some rubbing
ointments and has led to the death of children due to accidental ingestion. Fairly recently, a
high school athlete died from the overuse of topical sports cremes containing methyl salicylate.
(http://www.nbcnews.com/id/19208195/ns/health-fitness/t/sports-cream-warnings-urged-after­
teens-death/# .Wxg LYl Mvwcg)
1. Look in the Merck Index or online to find the toxicity of oil of wintergreen (methyl salicylate)
for rats, in mg/kg of body mass. ____
2.
How many grams of methyl salicylate would you personally have to eat to receive a toxic dose?
Analyze as follows:
a. What is your mass in kg?
b. Based on this mass, what is the predicted lethal dose?
3. A common rubbing ointment contains 30% methyl salicylate. How many grams of ointment
would you have to accidently ingest to receive a lethal dose of methyl salicylate
Review:
1. Ammonia NH 3, can be synthesized by the following reaction:
2NO + SH2 � 2NH3 + 2Hp
a.
If you start with 90.0 grams of NO and an unlimited supply of H 2, what is the theoretical yield
of ammonia, in grams?
b. How much water is produced?
c.
What is the percent yield if 25 grams of ammonia are produced?
LABORATORY 8
Name: __________________ Date: ___________
Section: __________
Instructor:
REPORT FORM
Experimental Data
Report Guide
Mass of Salicylic Acid Used
Mass of Watch Glass
Mass of Watch Glass+ Aspirin Obtained
Mass of Aspirin Obtained
Theoretical Yield Calculated Based on Salicylic Acid Used
Calculation:
= Xg Salicylic Acid x (1.3 g aspirin / 1 g salicylic acid)
Percent Yield
Calculation:
= (Experimental Yield / Theoretical Yield) x 100
Part I. Synthesis of Aspirin
Detailed Observations:
Part II. Formation of Methyl Salicylate
Detailed Observations:
Results and Discussion
A. Many aspirin tablets are formulated to contain 325 mg of aspirin. How many kilograms of aspirin
would be required to make 1000 aspirin tablets?
B. The toxicity of chemical compounds is often expressed as LD50, the amount of material which,
when ingested, will kill half of the test animals. Oil of wintergreen is used in some rubbing
ointments and has led to the death of children due to accidental ingestion. Fairly recently, a
high school athlete died from the overuse of topical sports cremes containing methyl salicylate.
(http://www.nbcnews.com/id/19208195/ns/health-fitness/t/sports-cream-warnings-urged-after­
teens-death/# .Wxg LYl Mvwcg)
1. Look in the Merck Index or online to find the toxicity of oil of wintergreen (methyl salicylate)
for rats, in mg/kg of body mass. ____
Oral LD50 for rats can be found at this link: https://www.fishersci.com/store/msds?
partNumber=O3695500&productDescription=METHYL+SALICYLATE+R
+500ML&vendorId=VN00033897&countryCode=US&language=en
2.
How many grams of methyl salicylate would you personally have to eat to receive a toxic dose?
Analyze as follows:
a. What is your mass in kg?
Take your weight and convert to kilograms. 1kg = 2.2 pounds
b.
Based on this mass, what is the predicted lethal dose?
Take the lethal dose you determine in part 1 and multiply by you mass in Kg. Units
must be shown in the calculation..
3.
A common rubbing ointment contains 30% methyl salicylate. How many grams of ointment
would you have to accidently ingest to receive a lethal dose of methyl salicylate
Use the lethal dose you determine for yourself in the previous question.
Keep in mind that:
.3 = Mass of Methyl Salicylate / Mass of Rubbing Ointment.
Use your lethal dose as the mass of methyl salicylate and solve for mass of
rubbing ointment.
Review:
1. Ammonia NH 3, can be synthesized by the following reaction:
2NO + SH2 � 2NH3 + 2Hp
a.
If you start with 90.0 grams of NO and an unlimited supply of H 2, what is the theoretical yield
of ammonia, in grams?
b. How much water is produced?
c.
What is the percent yield if 25 grams of ammonia are produced?

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