Calculate the specific rotation of a solution of a compound (30.0 g/100 mL of solution) that has a measured rotation of +25.25º in a 2.00 dm tube.
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Calculate the specific rotation of a solution of a compound (30.0 g/100 mL of solution) that has a measured rotation of +25.25º in a 2.00 dm tube.
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- Calculate the observed rotation for a solution of a substance (2.0 g/mL) that is 80% optically pure. A 2-dm cell is used. The specific rotation for the optically pure substance is 120°.The observed rotation of 2.0 g of a compound in 50 mL of solution in a polarimeter tube 20 cm long is +138°. What is the specific rotation of the compound?An aqueous solution containing 7.57 g of an optically-pure compound was diluted to 2.00×102 mL with water and placed in a 10.0 cm long polarimeter tube. The measured rotation was −4.11° at 25° C. Calculate the specific rotation of the compound.
- B)Calculate the angle of rotation expected for a solution containing sucrose at a concentration of 5.00g/L in a 10cm cell.A solution of 2.0 g of (+)-glyceraldehyde, HOCH2CHOHCHO, in 10.0 mL of water was placed in a 100-mm cell. Using the sodium D line, a rotation of +1.74° was found at 25 °C. Determine the specific rotation of (+)@glyceraldehyde.If a substance is known to have a specific rotation of +20.0 deg mL/g dm, what is the concentration (in g/mL) of a solution that would give an observed rotation of +10.0 degrees, if the path length of the sample tube was 1.00 dm? Can you do this problem in your head?
- A solution of 0.50 g of (-)@epinephrine dissolved in 10.0 mL of diluteaqueous HCl was placed in a 20-cm polarimeter tube. Using the sodium D line, the rotation was found to be -5.1° at 25 °C. Determine the specific rotation of epinephrine.A solution of an unknown compound (3.0 g of the compound in 200 mL of solution), when placed in a polarimeter tube 2.0 dm long, was found to rotate the plane of polarized light 18° in a counterclockwise direction. What is the specific rotation of the compound?A 0.712 Kg of sugar was dissolved in 600 mL of water. The optical rotation of the sugar using a 5.0 cm polarimeter tube is known to be +15.45○ mL/ dm g. What is the actual rotation of the substance?
- A 3.5 cm perimeter tube was used in the test of an unknown sugar with the observed rotation of -4.20. The optical rotation of the solution is -26.740 mL/dm g. Find the density of the sugar solution.A 0.300 g tablet of levetiracetam is dissolved in 7.50 mL of acetone and placed in a sample cell with a length of 10.0 cm, what is the observed rotation? Provide your numeric answer with correct significant figures.Which parameter between "solvent polarity function" and dielectric constant show better correlation with the peak positions? (cyclohexane, dioxane, acetonitrile, ethanol, ethylene glycol)
