10.0 mL of Solution B is added to a polarimeter tube that has a path length...
10.0 mL of Solution B is added to a polarimeter tube that has a path length of 10.0 cm. If
the observed rotation is +2.02,
the concentration is .03g/ml
a. what is the specific rotation of the unknown sugar?
b. which sugar is this most likely to be? (choose from the list of common unknown)
D-(+)-sucrose + 66.54
D-(+)-glucose + 52.74
D-(-)-fructose - 93.78
sugars).
Homework Answers
The specific rotation is +67.33 degree and the sugar most likely
to be the unknown is D-(+) Glucose.
Add Answer to:
10.0 mL of Solution B is added to a polarimeter tube that has a
path length...
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...
When a sucrose solution is placed in a 10.00 cm polarimeter tube, the observed rotation at...
When a sucrose solution is placed in a 10.00 cm polarimeter tube, the observed rotation at 20 degree Celsius using the D line of sodium is+19.92 degree. Calculate the concentration of the solution. [?]=+66.4 degree for sucrose.?
B. Procedure 1. Measure the [a]obs for both a 10.0 % D-glucose solution and a 10.0...
B. Procedure 1. Measure the [a]obs for both a 10.0 % D-glucose solution and a 10.0 % D-fructose solution. 2. Convert each of the measured [a]os to specific optical activity, [a] o 3. Compare your specific activity to published values and calculate your % error. D-glucose [a] 25 = 52.7° D-fructose[a] 2 = -92.4° Measured [a]obs Convert observed to specifc [a]obs → [a] o 25 % error x 100 experimental - theoretical theoretical C. Additional Questions 1. Calculate the [a]obs...
CH, CH CH,CH Compound A CH3 CH3 но CH3 CH3 CH3 CH3 Compound B 4.43 a) An aqueous solution containing 10 g of optically pure fructose was diluted to 500 mL with water and placed in a polarimeter t...
CH, CH CH,CH Compound A CH3 CH3 но CH3 CH3 CH3 CH3 Compound B 4.43 a) An aqueous solution containing 10 g of optically pure fructose was diluted to 500 mL with water and placed in a polarimeter tube 20 cm long. The measured rotation was 5.20°. Calculate the specific rotation of fructose. (b) If this solution were mixed with 500 mL of a solution containing 5 g of racemic fructose, what would be the specific rotation of the resulting...
8. Sucrose has a specific rotation of +65.5 at 25°C. A solution of 4.62g of an unknown pure substance in 10 mL ethanol shows an observed rotation of +20.4 in a cell with a 10 em path Tength. Is...
8. Sucrose has a specific rotation of +65.5 at 25°C. A solution of 4.62g of an unknown pure substance in 10 mL ethanol shows an observed rotation of +20.4 in a cell with a 10 em path Tength. Is it possible that the substance is sucrose? Show all your calculations for complete credit. (4 pts)-A- 2nd.. 20:t_r4个1558
8. Sucrose has a specific rotation of +65.5 at 25°C. A solution of 4.62g of an unknown pure substance in 10 mL ethanol...
4. 0.050 g of sample is dissolved in 2.0 mL of ethanol, and this solution is...
4. 0.050 g of sample is dissolved in 2.0 mL of ethanol, and this solution is placed in a 2.0-cm polarimeter tube. The observed rotation is clockwise 0.043. Calculate the specific rotations taken at 25°C using the sodium D line.
If 2.0 mL of distilled water is added to 3.0 mL of a 0.150 M solution...
If 2.0 mL of distilled water is added to 3.0 mL of a 0.150 M solution of CoCly, what is the concentration of the resulting solution? Show your work. (a) What is a calibration curve? (b) Why do we use a calibration curve to determine the concentration of our unknown 5. A colored sample with a concentration of 0.160 M has an absorbance of 0.80 in a 1.0 cm path length cuvette. (a) What would be the absorbance expected if...
D Apure stereoisomer of a compound has a specific rotation Of - 39.00. A 100 ML solution of o.187 g ot an ena...
D Apure stereoisomer of a compound has a specific rotation Of - 39.00. A 100 ML solution of o.187 g ot an enantiomeric mixture of the compound has an Obschied rotation of -6.520 When placed in a polanmeter tube 10cm long. what is the percent of each enantiomer in the solution? Show all work." ort Answer: Answer each question to the best of your ability. Be sure to show your thought udget your time wisely - not all questions are...
11 degrees at 10cm rotation of sucrose is 1 C=.171 Tength of the light path, and...
11 degrees at 10cm
rotation of sucrose is 1
C=.171
Tength of the light path, and the wavelength of the A standard formula is used to convert observed into "specific rotations" Tal a physical property tl be found in tables of physical properties of chemical compounds. al- 0 - measured rotation in angular degrees c = concentration in grams per milliliter of solution = cell length in decimeters D = wavelength of light, usually the D* line of a sodium...
Only answer 10. A 10.0 mL sample of 0.100 M KPO, is added to 20.0 mL...
Only answer
10. A 10.0 mL sample of 0.100 M KPO, is added to 20.0 mL of 0.300 M AgNO2. Silver The concentration of Ag ions in solution AFTER reaction phosphate precipitates. is, (A) 0.030 M (B) 0.100 MM (C) 0.200 M (D) 0.300 AM 11. The lattice energy of a salt is related to t he energy required to separate the ions. Which represents the correct order of the relative lattice energies for the ionic solids below? NaCl, CaO,...
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...
B. Procedure 1. Measure the [a]obs for both a 10.0 % D-glucose solution and a 10.0 % D-fructose solution. 2. Convert each of the measured [a]os to specific optical activity, [a] o 3. Compare your specific activity to published values and calculate your % error. D-glucose [a] 25 = 52.7° D-fructose[a] 2 = -92.4° Measured [a]obs Convert observed to specifc [a]obs → [a] o 25 % error x 100 experimental - theoretical theoretical C. Additional Questions 1. Calculate the [a]obs...
CH, CH CH,CH Compound A CH3 CH3 но CH3 CH3 CH3 CH3 Compound B 4.43 a) An aqueous solution containing 10 g of optically pure fructose was diluted to 500 mL with water and placed in a polarimeter tube 20 cm long. The measured rotation was 5.20°. Calculate the specific rotation of fructose. (b) If this solution were mixed with 500 mL of a solution containing 5 g of racemic fructose, what would be the specific rotation of the resulting...
8. Sucrose has a specific rotation of +65.5 at 25°C. A solution of 4.62g of an unknown pure substance in 10 mL ethanol shows an observed rotation of +20.4 in a cell with a 10 em path Tength. Is it possible that the substance is sucrose? Show all your calculations for complete credit. (4 pts)-A- 2nd.. 20:t_r4个1558
8. Sucrose has a specific rotation of +65.5 at 25°C. A solution of 4.62g of an unknown pure substance in 10 mL ethanol...
4. 0.050 g of sample is dissolved in 2.0 mL of ethanol, and this solution is placed in a 2.0-cm polarimeter tube. The observed rotation is clockwise 0.043. Calculate the specific rotations taken at 25°C using the sodium D line.
If 2.0 mL of distilled water is added to 3.0 mL of a 0.150 M solution of CoCly, what is the concentration of the resulting solution? Show your work. (a) What is a calibration curve? (b) Why do we use a calibration curve to determine the concentration of our unknown 5. A colored sample with a concentration of 0.160 M has an absorbance of 0.80 in a 1.0 cm path length cuvette. (a) What would be the absorbance expected if...
D Apure stereoisomer of a compound has a specific rotation Of - 39.00. A 100 ML solution of o.187 g ot an enantiomeric mixture of the compound has an Obschied rotation of -6.520 When placed in a polanmeter tube 10cm long. what is the percent of each enantiomer in the solution? Show all work." ort Answer: Answer each question to the best of your ability. Be sure to show your thought udget your time wisely - not all questions are...
11 degrees at 10cm
rotation of sucrose is 1
C=.171
Tength of the light path, and the wavelength of the A standard formula is used to convert observed into "specific rotations" Tal a physical property tl be found in tables of physical properties of chemical compounds. al- 0 - measured rotation in angular degrees c = concentration in grams per milliliter of solution = cell length in decimeters D = wavelength of light, usually the D* line of a sodium...
Only answer
10. A 10.0 mL sample of 0.100 M KPO, is added to 20.0 mL of 0.300 M AgNO2. Silver The concentration of Ag ions in solution AFTER reaction phosphate precipitates. is, (A) 0.030 M (B) 0.100 MM (C) 0.200 M (D) 0.300 AM 11. The lattice energy of a salt is related to t he energy required to separate the ions. Which represents the correct order of the relative lattice energies for the ionic solids below? NaCl, CaO,...
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