Homework Answers
Molar mass of vanillin = 152.15 g/mol
1 mole of vanillin weighs = 152.15 g
0.75 moles of vanillin = 0.75 x 152.15 g
= 114.1125 g
Mass of vanillin to obtain 0.75 moles of it , have to measure out 114.1125 grams of vanillin.
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Acetic Anhydride NaOH OCHa OCH3 он In the last experiment, we used 2.0 mmol of vanillin...
use the numbers from image 2 to help me answer all parts from image 1. I...
use the numbers from image 2 to help me answer all
parts from image 1. I am confused how to solve. will rate well
1. The molecular weight of vanillin (a solid) is 152.15. The molecular weight of acetic anhydride (a liquid) is 102.04 and its density is 1.082 g/mL. How many mmoles of vanillin and how many mmoles of acetic anhydride are being reacted in the BASE CATALYZED reaction as described in the textbook? a. 1.97 mmol of vanillin...
R1= OCH2C6H5, R2= OCH3 Identify the limiting reagent and calculate the theoretical yield? NaOH H3C -H20...
R1= OCH2C6H5, R2= OCH3
Identify the limiting reagent and calculate the theoretical
yield?
NaOH H3C -H20 R2 R1 Procedure: 1. Prepare a water bath for use later in the experiment by filling a pyrex dish -half full of water and heating it to 70 °C on a stirrer/hot plate. 2. Combine 3.5 mmol of your aldehyde and 3.5 mmol of your ketone with 2 mL of 95% ethanol in a 25- mL round-bottom flask and swirl the mixture briefly. 3....
Experiment Questions What is an epoxide and how is it useful with respect to synthesis design?...
Experiment Questions What is an epoxide and how is it useful with respect to synthesis design? • What are typical reagents used for epoxidation? • What is the mechanism for epoxidation? Must stereospecificity be considered? Experiment Techniques • Use of sodium bisulfite wash to remove excess peroxy acid from reaction mixture. Introduction By now you are well aware that the product of previous experiment (reaction of cyclohexanol and acid) is an alkene. You should also be storing key reactions of...
2. How many mL of 0.100M NaOH would you need to titrate if you measured out...
2. How many mL of 0.100M NaOH would you need to titrate if you measured out 0.120 g of oxalic acid? Must show calculation. (5 pts) lying an unknown acid Objective: Identify an unknown diprotic acid by determining its molecular weight. Introduction: A diprotic acid is an acid that yields two H ions per acid molecule. Therefore, two moles of NaOH are need to react with every one mole of diprotic acid. The net reaction of a diprotic acid, H:X,...
2. Carly the chemistry student performs an experiment with vinegar (active ingredient acetic acid, CH,COOH) and...
2. Carly the chemistry student performs an experiment with vinegar (active ingredient acetic acid, CH,COOH) and baking soda (NaHCO3). Her professor asks her to place varying amounts of baking soda and vinegar into sealable plastic bags, quickly seal the bags, and observe the reaction. The balanced chemical equation for the reaction is given here NaHCO3(aq) + CH.COOH(aq) → CO2(g) + H20(1) - NaCH,COO(aq) a) Use limiting reagent calculations to fill in the following table. Please show your work Trial Baking...
I need it right now, please help me?? PROCEDURE PART I: DILUTING THE VINEGAR SOLUTION The...
I
need it right now, please help me??
PROCEDURE PART I: DILUTING THE VINEGAR SOLUTION The vinegar solution must be diluted by a factor of 5 to be suitable for titration. 1. Obtain - 20 ml of the stock vinegar solution from the fume hood. 2. Using the 10-ml. pipet, pipet" 10 mL of the stock solution to a 50-ml volumetric flask. 3. Fill the volumetric flask to the calibration line with distilled water. Be sure not to go over...
Experiment Write Up Proposal You will write up a synthesis procedure for one reaction that could...
Experiment Write Up Proposal You will write up a synthesis procedure for one reaction that could be potentially run in a face- to-face Chem 2321 lab session. Your proposal will include an introduction and procedure. The procedure will include step-by-step instructions for running the reaction (including reaction monitoring), work-up. (product isolation and purification), and analysis (characterization). You will need to include sample calculations for percent yield and provide sample spectra analysis. You must upload your proposal as a single document...
The titrant solution is on the last page. All the info needed is on the pages provided. paticularly on t...
The
titrant solution is on the last page.
All
the info needed is on the pages provided. paticularly on the last
page
Table 1: Standardization Data Trial 3 Trial 1 Trial 2 O.47644 0.4701 25. mL ou779 12.7mL 25. mL 12.4 mL Mass of KHP Initial burette reading 2.7mL 37,Sm 2.4m Final burette reading 12.7mL Volume of base used Data Analysis: 1. Write a balanced molecular equation (with phases, of course) for the reaction between the KHP and the titrant...
It's a weak acid strong base titration Experiment 4: Identification of an unknown acid by titration...
It's a weak acid strong base titration
Experiment 4: Identification of an unknown acid by titration Page 2 of 15 Background In this experiment, you will use both qualitative and quantitative properties to determine an unknown acid's identity and concentration. To do this analysis, you will perform a titration of your unknown acid sample-specifically a potentiometric titration where you use a pH meter and record pH values during the titration, combined with a visual titration using a color indi- cator...
Titration: Acids and Bases 2. How can you determine which acid is diprotic? 3. using the...
Titration: Acids and Bases
2. How can you determine which acid is diprotic?
3. using the answers to questions one and two, which acid is
diprotic?
4. Which base has more hydroxide ions per molecule?
Acid Volume Base Base Initial Volume (mL) Base Final Volume (mL) Volume of Base Used (mL) Acid: Base Ratio Acid 1 20 mL Base 1 50 mL 34.5 15.5 4:3 Acid 2 20 mL Base 1 Acid 1 20 mL Base 2 Acid 2 20...
use the numbers from image 2 to help me answer all
parts from image 1. I am confused how to solve. will rate well
1. The molecular weight of vanillin (a solid) is 152.15. The molecular weight of acetic anhydride (a liquid) is 102.04 and its density is 1.082 g/mL. How many mmoles of vanillin and how many mmoles of acetic anhydride are being reacted in the BASE CATALYZED reaction as described in the textbook? a. 1.97 mmol of vanillin...
R1= OCH2C6H5, R2= OCH3
Identify the limiting reagent and calculate the theoretical
yield?
NaOH H3C -H20 R2 R1 Procedure: 1. Prepare a water bath for use later in the experiment by filling a pyrex dish -half full of water and heating it to 70 °C on a stirrer/hot plate. 2. Combine 3.5 mmol of your aldehyde and 3.5 mmol of your ketone with 2 mL of 95% ethanol in a 25- mL round-bottom flask and swirl the mixture briefly. 3....
Experiment Questions What is an epoxide and how is it useful with respect to synthesis design? • What are typical reagents used for epoxidation? • What is the mechanism for epoxidation? Must stereospecificity be considered? Experiment Techniques • Use of sodium bisulfite wash to remove excess peroxy acid from reaction mixture. Introduction By now you are well aware that the product of previous experiment (reaction of cyclohexanol and acid) is an alkene. You should also be storing key reactions of...
2. How many mL of 0.100M NaOH would you need to titrate if you measured out 0.120 g of oxalic acid? Must show calculation. (5 pts) lying an unknown acid Objective: Identify an unknown diprotic acid by determining its molecular weight. Introduction: A diprotic acid is an acid that yields two H ions per acid molecule. Therefore, two moles of NaOH are need to react with every one mole of diprotic acid. The net reaction of a diprotic acid, H:X,...
2. Carly the chemistry student performs an experiment with vinegar (active ingredient acetic acid, CH,COOH) and baking soda (NaHCO3). Her professor asks her to place varying amounts of baking soda and vinegar into sealable plastic bags, quickly seal the bags, and observe the reaction. The balanced chemical equation for the reaction is given here NaHCO3(aq) + CH.COOH(aq) → CO2(g) + H20(1) - NaCH,COO(aq) a) Use limiting reagent calculations to fill in the following table. Please show your work Trial Baking...
I
need it right now, please help me??
PROCEDURE PART I: DILUTING THE VINEGAR SOLUTION The vinegar solution must be diluted by a factor of 5 to be suitable for titration. 1. Obtain - 20 ml of the stock vinegar solution from the fume hood. 2. Using the 10-ml. pipet, pipet" 10 mL of the stock solution to a 50-ml volumetric flask. 3. Fill the volumetric flask to the calibration line with distilled water. Be sure not to go over...
Experiment Write Up Proposal You will write up a synthesis procedure for one reaction that could be potentially run in a face- to-face Chem 2321 lab session. Your proposal will include an introduction and procedure. The procedure will include step-by-step instructions for running the reaction (including reaction monitoring), work-up. (product isolation and purification), and analysis (characterization). You will need to include sample calculations for percent yield and provide sample spectra analysis. You must upload your proposal as a single document...
The
titrant solution is on the last page.
All
the info needed is on the pages provided. paticularly on the last
page
Table 1: Standardization Data Trial 3 Trial 1 Trial 2 O.47644 0.4701 25. mL ou779 12.7mL 25. mL 12.4 mL Mass of KHP Initial burette reading 2.7mL 37,Sm 2.4m Final burette reading 12.7mL Volume of base used Data Analysis: 1. Write a balanced molecular equation (with phases, of course) for the reaction between the KHP and the titrant...
It's a weak acid strong base titration
Experiment 4: Identification of an unknown acid by titration Page 2 of 15 Background In this experiment, you will use both qualitative and quantitative properties to determine an unknown acid's identity and concentration. To do this analysis, you will perform a titration of your unknown acid sample-specifically a potentiometric titration where you use a pH meter and record pH values during the titration, combined with a visual titration using a color indi- cator...
Titration: Acids and Bases
2. How can you determine which acid is diprotic?
3. using the answers to questions one and two, which acid is
diprotic?
4. Which base has more hydroxide ions per molecule?
Acid Volume Base Base Initial Volume (mL) Base Final Volume (mL) Volume of Base Used (mL) Acid: Base Ratio Acid 1 20 mL Base 1 50 mL 34.5 15.5 4:3 Acid 2 20 mL Base 1 Acid 1 20 mL Base 2 Acid 2 20...
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