Homework Answers
α = observed rotation in degrees.
l = cell path length in decimeters. (1 decimeter = 1 dm = 10 cm. A standard polarimeter tube is 1.00 dm in length.)
c = concentration in g ml-1 for a pure liquid compound (i.e., the liquid's density), or g 100 ml-1 for a solution.
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Complete the table below Calculate specific rotation of your Unknown and Known solutions before you leave...
Part I: You are instructed to produce solutions of H2S04 and NaOH for your lab experiment. The concentration you should produce is shown in the table below. Complete the table and copy it into your l...
Part I: You are instructed to produce solutions of H2S04 and NaOH for your lab experiment. The concentration you should produce is shown in the table below. Complete the table and copy it into your lab notebook for use during your lab. You will be provided with a 3.0 M stock solution of H2SO4 and solid NaOH. You will need to make 100 mL of each solution. H2SO4 Compound NaOH 0.9 Solution Concentration (M) 1.12 Moles in 100 mL 112...
A. In this equation for specific rotation of a solution: a is the observed rotation in degrees, i...
a. In this equation for specific rotation of a solution: a is the observed rotation in degrees, is the path length in decimetres, c is the concentration in g mL-1, Tis the temperature at which the measurement was taken in °C, and A is the wavelength in nanometres. You used variable path lengths for the polarised light (589 nm) to pass through, and you obtained the fol solutions (A, B, C, D and E) at variable concentrations. observed rotation data...
5.41 Predict the value for the specific rotation of the following compound. Explain your answer. -OH...
5.41 Predict the value for the specific rotation of the following compound. Explain your answer. -OH НО. 5.42 The specific rotation of (S)-2-butanol is +13.5. If 1.00 g of its enantiomer is dissolved in 10.0 mL of ethanol and placed in a sample cell with a length of 1.00 dm, what observed rotation do you expect? 5.43 The specific rotation of l-alanine in water (at 25°C) is +2.8. A chemist prepared a mixture of l- alanine and its enantiomer, and...
7a.) Enantiomerically pure xylose (shown below) has a specific rotation of approximately -21 Is t...
7a.) Enantiomerically pure xylose (shown below) has a specific rotation of approximately -21 Is the enantiome r shown below the D or the L form of xylose? How do you know? (3 points) e of xylose were made and it was found to have a specific rotation of-15°, what would be the enantiomeric excess of this sample (clearly show your working)? (3 points) What would be the stereoisomeric composition of the mixture (D/L)? (2 points) CHO но он HOH CH2OH...
Prelaboratory assignment Exp. 4 Beer’s Law 1.Calculate the Concentration of the Crystal Violet Solutions in Table...
Prelaboratory assignment Exp. 4 Beer’s Law
1.Calculate the Concentration of the Crystal Violet Solutions in
Table 1 of the Procedureusing Vinitial x Minitial = Vdiluted x
Mdiluted (Note: Vdiluted = 15 mL). Record the concentrationsin
Table 1 AND in the Data table in the report sheet.
2.Plot the following data as absorbance vs concentration of X in
excel
Absorbance, A Molar Concentration of X
0.045 3.0 x 10-4 mol/L
0.097 6.2 x 10-4 mol/L
0.14 9.0 x 10-4 mol/L...
Data Collection Table for Part C (This information needs to be in your lab notebook before you come to lab. You will fi...
Data Collection Table for Part C (This information needs to be in your lab notebook before you come to lab. You will fill in the data directly into your notebook as you complete the lab.) 24.2 23.7 30.4 6.45 Initial Temp. of HCI Initial Temp. of NaOH Final Temp. of Mixture AT solution solution qreaction Number of moles of water formed AHrxn (reaction / moles water) (units: kJ/mol) Calculate AT solution, (average the initial temperatures of HCl and NaOH as...
3. Utilizing the data below to calculate the absorbances of your dilutions from part 2. Known...
3. Utilizing the data below to calculate the absorbances of your dilutions from part 2. Known Concentration % Transmittance 0.20 0 0.18 13 0.16 0.14 16 20.1 26 0.12 4. Type your concentrations into the data table below. Generate a graph of your dilution data from part 2 above. Absorbance Solution Concentration OM (blank) 4 When finished, start calculating the data below, based on your dilution data from part 2. Perform the best linear regression using Graphing calculator or Excel...
To complete your pictorial representation of the problem. you should compound two lists one of known...
To complete your pictorial representation of the problem. you should compound two lists one of known quantities and one of the unknown quantities that will allow you to answer the question in the problem Below are all of the relevant qualities m this problem Sort them accordingly
Each week before you have chemistry lab, someone needs to prepare all the solutions you will...
Each week before you have chemistry lab, someone needs to prepare all the solutions you will use in your experiment. Suppose your experiment for next week calls for 0.500 M NaOH solution, 3.00 M NH4Cl solution, and 0.100 M Na3PO4 solution. Calculate the mass in grams for each solute that would be needed to prepare 8.00 L of each of the solutions. Calculate the mass, in grams, of solute present in each of the following solutions: a. 225 g of...
solve question The table below lists results of data collected for known solutions of Pb2", Cu...
solve question
The table below lists results of data collected for known solutions of Pb2", Cu and N when test solutions of HCl, NaOH and NH3 are added. Use results from the Table to answer questions below Test solution added Known solution Observations A white precipitate formed. The precipitate dissolved upon addition of more HCI solution HCI NaOH A white precipitate formed NHs No change was evident in the white precipitate. HCI No reaction NaOH A blue precipitate formed NH...
Part I: You are instructed to produce solutions of H2S04 and NaOH for your lab experiment. The concentration you should produce is shown in the table below. Complete the table and copy it into your lab notebook for use during your lab. You will be provided with a 3.0 M stock solution of H2SO4 and solid NaOH. You will need to make 100 mL of each solution. H2SO4 Compound NaOH 0.9 Solution Concentration (M) 1.12 Moles in 100 mL 112...
a. In this equation for specific rotation of a solution: a is the observed rotation in degrees, is the path length in decimetres, c is the concentration in g mL-1, Tis the temperature at which the measurement was taken in °C, and A is the wavelength in nanometres. You used variable path lengths for the polarised light (589 nm) to pass through, and you obtained the fol solutions (A, B, C, D and E) at variable concentrations. observed rotation data...
5.41 Predict the value for the specific rotation of the following compound. Explain your answer. -OH НО. 5.42 The specific rotation of (S)-2-butanol is +13.5. If 1.00 g of its enantiomer is dissolved in 10.0 mL of ethanol and placed in a sample cell with a length of 1.00 dm, what observed rotation do you expect? 5.43 The specific rotation of l-alanine in water (at 25°C) is +2.8. A chemist prepared a mixture of l- alanine and its enantiomer, and...
7a.) Enantiomerically pure xylose (shown below) has a specific rotation of approximately -21 Is the enantiome r shown below the D or the L form of xylose? How do you know? (3 points) e of xylose were made and it was found to have a specific rotation of-15°, what would be the enantiomeric excess of this sample (clearly show your working)? (3 points) What would be the stereoisomeric composition of the mixture (D/L)? (2 points) CHO но он HOH CH2OH...
Prelaboratory assignment Exp. 4 Beer’s Law
1.Calculate the Concentration of the Crystal Violet Solutions in
Table 1 of the Procedureusing Vinitial x Minitial = Vdiluted x
Mdiluted (Note: Vdiluted = 15 mL). Record the concentrationsin
Table 1 AND in the Data table in the report sheet.
2.Plot the following data as absorbance vs concentration of X in
excel
Absorbance, A Molar Concentration of X
0.045 3.0 x 10-4 mol/L
0.097 6.2 x 10-4 mol/L
0.14 9.0 x 10-4 mol/L...
Data Collection Table for Part C (This information needs to be in your lab notebook before you come to lab. You will fill in the data directly into your notebook as you complete the lab.) 24.2 23.7 30.4 6.45 Initial Temp. of HCI Initial Temp. of NaOH Final Temp. of Mixture AT solution solution qreaction Number of moles of water formed AHrxn (reaction / moles water) (units: kJ/mol) Calculate AT solution, (average the initial temperatures of HCl and NaOH as...
3. Utilizing the data below to calculate the absorbances of your dilutions from part 2. Known Concentration % Transmittance 0.20 0 0.18 13 0.16 0.14 16 20.1 26 0.12 4. Type your concentrations into the data table below. Generate a graph of your dilution data from part 2 above. Absorbance Solution Concentration OM (blank) 4 When finished, start calculating the data below, based on your dilution data from part 2. Perform the best linear regression using Graphing calculator or Excel...
To complete your pictorial representation of the problem. you should compound two lists one of known quantities and one of the unknown quantities that will allow you to answer the question in the problem Below are all of the relevant qualities m this problem Sort them accordingly
Each week before you have chemistry lab, someone needs to prepare all the solutions you will use in your experiment. Suppose your experiment for next week calls for 0.500 M NaOH solution, 3.00 M NH4Cl solution, and 0.100 M Na3PO4 solution. Calculate the mass in grams for each solute that would be needed to prepare 8.00 L of each of the solutions. Calculate the mass, in grams, of solute present in each of the following solutions: a. 225 g of...
solve question
The table below lists results of data collected for known solutions of Pb2", Cu and N when test solutions of HCl, NaOH and NH3 are added. Use results from the Table to answer questions below Test solution added Known solution Observations A white precipitate formed. The precipitate dissolved upon addition of more HCI solution HCI NaOH A white precipitate formed NHs No change was evident in the white precipitate. HCI No reaction NaOH A blue precipitate formed NH...
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