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Question 7 2 pts Using the same data from question 3, what is the Kd of...
II. Digestion of Acetylsalicylic acid(standard and tablet) with NaOH . Digestion of Acetylsalicylic Acid Standard to Pr...
II. Digestion of Acetylsalicylic acid(standard and tablet) with NaOH . Digestion of Acetylsalicylic Acid Standard to Prepare Stock Solution: Obtain ca. 0.1 g dried acetylsalicylic acid (MM = 180.16 g/mol), accurately weighed, and quantitatively transfer to a 125-ml Erlenmeyer flask. Add 5 ml 1.0 M NaOH and heat mixture to boiling on a hot plate. This will hydrolyze the acetylsalicylic acid to sodium salicylate. If necessary, rinse down the walls of the Erlenmeyer with DI water to ensure complete hydrolysis...
QUESTIONS 1. Determine the concentration of the HCL solution from the data for the standardization of...
QUESTIONS 1. Determine the concentration of the HCL solution from the data for the standardization of the HCL with the Na2CO3 2. using your data, calculate the moles and mass of acetylsalicylic acid in each tablet (molar mass=180.16g/mol) 3. Using your data, calculate the % by mass of aspirin in the tablet DATA: 1. Make two solutions; Add 1 tablet of aspirin to an erlenmeyer flask 2. using a 50mL pipette, add 50.0mL of NaOH to the tablets in the...
B. Determination of the Molarity of Unknown Acid Trial 1 Trial 2 Trial 3 Mass of...
B. Determination of the Molarity of Unknown Acid Trial 1 Trial 2 Trial 3 Mass of Erlenmeyer flask (g) 124 g Mass of Erlenmeyer flask+acid After adding 5 mL HCl solution (g) 135 g Mass of HCl solution (g) Mass of HCl solution (kg) -------- ------ -- Volume (acid), mL ----5mL------- -----5 mL--- ------5mL---- NaOH Initial Volume (Vi) 0.00 mL ------------mL -------------mL NaOH final Volume (VA) 16.5 mL ----------- -------------m L ml ---------mL NaOH Volume Used Vi-Vi --------mL L
(TITRATION) What would be the calculations based on the trial data gathered? I obtained 50mL of...
(TITRATION) What would be the calculations based on the trial
data gathered?
I obtained 50mL of NaOH solution and then pipetted 5.0mL of
pickle juice into an Erlenmeyer flask. I then added 50mL of
distilled water and 2 drops of indicator.
Molarity of NaOH: 0.1001M Trial 1 Vinitial: 24.50 mL Vfinal: 45.72 mL Trial 2 Vinitial: 2.42 mL Vfinal: 23.74 mL Trial 3 Vinitial: 23.74 mL Vfinal: 44.22 mL Calculations Assume that the acid present in your food sample is...
question one question two Aspirin lab (10 points) 5. a) Spectroscopy is being used to determine...
question one
question two
Aspirin lab (10 points) 5. a) Spectroscopy is being used to determine the concentration of aspirin in an unknown sample. The absorbance spectrum of the highest concentration standard [Fe3+, SA) prepared is given below. What wavelength should be used to create the calibration curve for the experiment? Explain your reasoning. 0.14 Absorbance 0.02 250 300 450 500 350 400 Wavelength (nm) Wavelength Explain your reason briefly. b) In this experiment an aspirin tablet was placed in...
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) *...
Barometric pressure, in mmHg778. 3 in atm 02 Trial 1 Trial 2 Trial 3 Weight of...
Barometric pressure, in mmHg778. 3 in atm 02 Trial 1 Trial 2 Trial 3 Weight of empty Erlenmeyer flask and aluminum foil Weight of Erlenmeyer flask, foil and vapor after heating Weight of vapor 82. 1179 83-7079 b.5909 88 3549 103. 7%9 104.3199 0.549 88.8839 0.5399 Volume of flask in L Volume of the vapor o.1580L O.1530 L O.1540L Temperature in K 369-15K 367-(5K 3CE15K Calculate the molecu lar weight of the unknown. Be sure to convert units so that...
question 1 and 2! CHE 129A Lab 5_Liquid-Liquid Extraction Name : Rika Mochizuki Date : _...
question 1 and 2!
CHE 129A Lab 5_Liquid-Liquid Extraction Name : Rika Mochizuki Date : _ 10/28/19 Notebook Ref: _Attached! Part 1: Simple Extraction and Determination of the Distribution Coefficient (Partition Coefficient) for Propionic Acid Between Ether and Water Table 1 (a) Preparation of Propionic Acid (PA) Solution weight PA Volume H2O (mL) (b) Titration of Aqueous Propionic Acid Solution Before Ether Extraction Volume PA Volume NaOH Aliquot (mL) (mL) 10.wml 18.00ml (c) Titration of Aqueous Propionic Solution After Ether...
help with All 8 questions please Question 13 2 pts How many moles of carbon are...
help with All 8 questions please
Question 13 2 pts How many moles of carbon are there in 19.3 g of sucrose, CH120.? Use 180.16 g/mol as the mw of ose. Give your answer three decimal places. su Question 14 3 pts A sample of C6H12 has 34.5 g of carbon. How many moles of CH 12 are there? Use 12.01 g/mol as the mw of carbon and 84.16 g/mol as the mw of C6H12. Give your answer to three...
This procedure was conducted for diethyl n-butylmalonate. The question is: What is the purpose of the...
This procedure was conducted for diethyl n-butylmalonate. The
question is: What is the purpose of the tricaprylmethylammonium
chloride and why is it used in a nomstoichiometric?
Chapter 42 Malonic Ester of a Barbiturate 541 Into a 5-mL long-necked, round-bottomed flask, weigh 40 mg of tricaprylmethylammonium chloride, 400 mg of diethyl malonate, 350 mg of 1-bromobutane, and 415 mg of anhydrous potassium carbonate. Attach the empty distillation column as an air condenser and reflux the mixture for 1.5 hours (Fig. 42.1)....
B. Determination of the Molarity of Unknown Acid Trial 1 Trial 2 Trial 3 Mass of Erlenmeyer flask (g) 124 g Mass of Erlenmeyer flask+acid After adding 5 mL HCl solution (g) 135 g Mass of HCl solution (g) Mass of HCl solution (kg) -------- ------ -- Volume (acid), mL ----5mL------- -----5 mL--- ------5mL---- NaOH Initial Volume (Vi) 0.00 mL ------------mL -------------mL NaOH final Volume (VA) 16.5 mL ----------- -------------m L ml ---------mL NaOH Volume Used Vi-Vi --------mL L
(TITRATION) What would be the calculations based on the trial
data gathered?
I obtained 50mL of NaOH solution and then pipetted 5.0mL of
pickle juice into an Erlenmeyer flask. I then added 50mL of
distilled water and 2 drops of indicator.
Molarity of NaOH: 0.1001M Trial 1 Vinitial: 24.50 mL Vfinal: 45.72 mL Trial 2 Vinitial: 2.42 mL Vfinal: 23.74 mL Trial 3 Vinitial: 23.74 mL Vfinal: 44.22 mL Calculations Assume that the acid present in your food sample is...
question one
question two
Aspirin lab (10 points) 5. a) Spectroscopy is being used to determine the concentration of aspirin in an unknown sample. The absorbance spectrum of the highest concentration standard [Fe3+, SA) prepared is given below. What wavelength should be used to create the calibration curve for the experiment? Explain your reasoning. 0.14 Absorbance 0.02 250 300 450 500 350 400 Wavelength (nm) Wavelength Explain your reason briefly. b) In this experiment an aspirin tablet was placed in...
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) *...
Barometric pressure, in mmHg778. 3 in atm 02 Trial 1 Trial 2 Trial 3 Weight of empty Erlenmeyer flask and aluminum foil Weight of Erlenmeyer flask, foil and vapor after heating Weight of vapor 82. 1179 83-7079 b.5909 88 3549 103. 7%9 104.3199 0.549 88.8839 0.5399 Volume of flask in L Volume of the vapor o.1580L O.1530 L O.1540L Temperature in K 369-15K 367-(5K 3CE15K Calculate the molecu lar weight of the unknown. Be sure to convert units so that...
question 1 and 2!
CHE 129A Lab 5_Liquid-Liquid Extraction Name : Rika Mochizuki Date : _ 10/28/19 Notebook Ref: _Attached! Part 1: Simple Extraction and Determination of the Distribution Coefficient (Partition Coefficient) for Propionic Acid Between Ether and Water Table 1 (a) Preparation of Propionic Acid (PA) Solution weight PA Volume H2O (mL) (b) Titration of Aqueous Propionic Acid Solution Before Ether Extraction Volume PA Volume NaOH Aliquot (mL) (mL) 10.wml 18.00ml (c) Titration of Aqueous Propionic Solution After Ether...
help with All 8 questions please
Question 13 2 pts How many moles of carbon are there in 19.3 g of sucrose, CH120.? Use 180.16 g/mol as the mw of ose. Give your answer three decimal places. su Question 14 3 pts A sample of C6H12 has 34.5 g of carbon. How many moles of CH 12 are there? Use 12.01 g/mol as the mw of carbon and 84.16 g/mol as the mw of C6H12. Give your answer to three...
This procedure was conducted for diethyl n-butylmalonate. The
question is: What is the purpose of the tricaprylmethylammonium
chloride and why is it used in a nomstoichiometric?
Chapter 42 Malonic Ester of a Barbiturate 541 Into a 5-mL long-necked, round-bottomed flask, weigh 40 mg of tricaprylmethylammonium chloride, 400 mg of diethyl malonate, 350 mg of 1-bromobutane, and 415 mg of anhydrous potassium carbonate. Attach the empty distillation column as an air condenser and reflux the mixture for 1.5 hours (Fig. 42.1)....
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