Homework Answers
moles NaOH = M NaOH * LNaOH = ( 0.5065)(0.03517) = 0.0178 moles NaOH
moles NaOH = moles aspirin since aspirin has one acidic hydrogen
moles aspirin = ( 3.210 g / 180.157 g/mol) = 0.01781 moles
MM = ( g aspirin / moles aspirin) = ( 3.210 g / 0.01781 mol ) = 180.2 g / mol
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Acetylsalicylic acid is the active ingredient in aspirin. It took 35.17 ml of 0.5065 M sodium...
The active ingredient in aspirin is acetylsalicylic acid (HC9H7O4), a monoprotic acid with Ka=3.3×10−4 at 25...
The active ingredient in aspirin is acetylsalicylic acid (HC9H7O4), a monoprotic acid with Ka=3.3×10−4 at 25 ∘C What is the pHpH of a solution obtained by dissolving two extra-strength aspirin tablets, containing 590 mg of acetylsalicylic acid each, in 260 mL of water?
The active ingredient in aspirin is acetylsalicylic acid (HC9H704), a monoprotic acid with a Ka of...
The active ingredient in aspirin is acetylsalicylic acid (HC9H704), a monoprotic acid with a Ka of 3.3 x 10-4 at 25°C. Part A You may want to reference (Pages 680 - 690) Section 16.6 while completing this problem. What is the pH of a solution obtained by dissolving two extra-strength aspirin tablets, containing 410 mg of acetylsalicylic acid each, in 270 mL of water? Express your answer to two decimal places. V AED o 2 ? pH = pH= Submit
a) The active ingredient in Aspirin™ is acetylsalicylic acid, HC9H7O4 (Ka = 2.75 x 10–5). To...
a) The active ingredient in Aspirin™ is acetylsalicylic acid, HC9H7O4 (Ka = 2.75 x 10–5). To treat your headache after writing exams, you take two tablets dissolved in 250 mL of water. If each tablet contains 0.32 g acetylsalicylic acid, find the pH of the solution. Proper pH significant digit is required for full marks. b)Hydrazine, N2H4, is a base in aqueous solution. A 0.20 mol/L solution of hydrazine in water has pH = 10.77. What is Kbfor hydrazine? Express...
Though salicylic acid is the physiologically active chemical ingredient in aspirin, consumer aspirin formulations are actually...
Though salicylic acid is the physiologically active chemical ingredient in aspirin, consumer aspirin formulations are actually sold as a “derivatized” form of salicylic acid known as acetylsalicylic acid. Describe in detail the chemistry by which this aspirin formulation is synthesized and explain why we don’t just ingest aspirin composed of salicylic acid. After all, humans have been chewing on and making teas of willow bark to get the benefits of salicylic acid for thousands of years. What is the rationale?...
Integrated Problems #12 Common aspirin is acetylsalicylic acid, which has the structure shown below and a...
Integrated Problems #12 Common aspirin is acetylsalicylic acid, which has the structure shown below and a pKa of 3.5. The acidic hydrogen is indicated with the star. H 30: ö-H ö-C-C-H :0: H 1) What is the shape and hybridization around the carbon 1, carbon 2. oxygen 3. 2) What is the bond angle at 1, 2, 3? 3) What types of intermolecular interactions is this molecule capable? 4) Is acetylsalicylic acid a strong or weak acid? 5) Write a...
3a) The solubility of Aspirin (acetylsalicylic acid) at 25C is 3.0 mg/mL of water. Calculate the...
3a) The solubility of Aspirin (acetylsalicylic acid) at 25C is 3.0 mg/mL of water. Calculate the molar concentration (M) of acetylsalicylic acid in solution at this temperature. What density assumption can help you in solving this problem? b) The acid dissociation constant, Ka for acetylsalicylic acid is 3.0 x 10 -4. calculate the pH of this solution.
If 25 mL of nitric acid is titrated with 0.12 M sodium hydroxide and it took...
If 25 mL of nitric acid is titrated with 0.12 M sodium hydroxide and it took 10 mL of the sodium hydroxide to fully neutralize the nitric acid, what was the concentration of the nitric acid at the start of the titration? D View hint for Question 19 Question 20 (4 points) How many milliliters of 2.25 M HCl would be required to titrate 6.00 g of KOH? Your Answer: Answer units
molarity of acid: 0.1435M volume:25ml 1. Use the molar mass and moles of acetic acid to...
molarity of acid: 0.1435M
volume:25ml
1. Use the molar mass and moles of acetic acid to determine the mass of the acetic acid in the 25.00-ml sample. 2. Calculate the mass/volume percentage (m/v %) by dividing the mass of acetic acid in grams by the volume of the vinegar sample in mL and multiplying by 100. 3. For the reaction of sodium hydroxide solution with a solution of hydrochloric acid: a. Write a balanced molecular equation for the reaction, including...
Aspirin is acetylsalicylic acid (ASA) ( C9H8O4). It reacts with NaOH ( a base) to produce...
Aspirin is acetylsalicylic
acid (ASA) (
C9H8O4). It reacts with NaOH ( a
base) to produce salt (sodium acetylate) and water. Both Aspirin
and NaOH react in 1:1 molar ratio, as
C9H8O4
+
NaOH →
NaC9H7O4
+ H2O
So, moles of NaOH = moles of ASA
Or, mmol of of NaOH = mmole of
ASA
; mmol is milli mol
and mmole of NaOH = Molarity of NaOH * Volume
of naOH used (in ml)
=
(0.1177 M) *...
Experiment 2: Synthesis of Aspirin (Acetylsalicylic Acid ) 1. How many moles of salicylic acid are...
Experiment 2: Synthesis of Aspirin (Acetylsalicylic Acid ) 1. How many moles of salicylic acid are there in 1.0 grams of salicylic acid? 2. How many moles of acetic anhydride are there in 3 mL of acetic anhydride? 3. When 1.0g of salicylic acid and 3 mL of acetic anhydride react, DETERMINE which one is the limiting reactant (you can go to General Chemistry if you need help about limiting reagent)? 4. What is phosphoric acid used for in the...
The active ingredient in aspirin is acetylsalicylic acid (HC9H704), a monoprotic acid with a Ka of 3.3 x 10-4 at 25°C. Part A You may want to reference (Pages 680 - 690) Section 16.6 while completing this problem. What is the pH of a solution obtained by dissolving two extra-strength aspirin tablets, containing 410 mg of acetylsalicylic acid each, in 270 mL of water? Express your answer to two decimal places. V AED o 2 ? pH = pH= Submit
Integrated Problems #12 Common aspirin is acetylsalicylic acid, which has the structure shown below and a pKa of 3.5. The acidic hydrogen is indicated with the star. H 30: ö-H ö-C-C-H :0: H 1) What is the shape and hybridization around the carbon 1, carbon 2. oxygen 3. 2) What is the bond angle at 1, 2, 3? 3) What types of intermolecular interactions is this molecule capable? 4) Is acetylsalicylic acid a strong or weak acid? 5) Write a...
If 25 mL of nitric acid is titrated with 0.12 M sodium hydroxide and it took 10 mL of the sodium hydroxide to fully neutralize the nitric acid, what was the concentration of the nitric acid at the start of the titration? D View hint for Question 19 Question 20 (4 points) How many milliliters of 2.25 M HCl would be required to titrate 6.00 g of KOH? Your Answer: Answer units
molarity of acid: 0.1435M
volume:25ml
1. Use the molar mass and moles of acetic acid to determine the mass of the acetic acid in the 25.00-ml sample. 2. Calculate the mass/volume percentage (m/v %) by dividing the mass of acetic acid in grams by the volume of the vinegar sample in mL and multiplying by 100. 3. For the reaction of sodium hydroxide solution with a solution of hydrochloric acid: a. Write a balanced molecular equation for the reaction, including...
Aspirin is acetylsalicylic
acid (ASA) (
C9H8O4). It reacts with NaOH ( a
base) to produce salt (sodium acetylate) and water. Both Aspirin
and NaOH react in 1:1 molar ratio, as
C9H8O4
+
NaOH →
NaC9H7O4
+ H2O
So, moles of NaOH = moles of ASA
Or, mmol of of NaOH = mmole of
ASA
; mmol is milli mol
and mmole of NaOH = Molarity of NaOH * Volume
of naOH used (in ml)
=
(0.1177 M) *...
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