Question

A sample contains a mixture of (+) and (-)- carvone. When you measure the optical rotation...

A sample contains a mixture of (+) and (-)- carvone. When you measure the optical rotation of the neat sample (no solvent) at 20°C using a polarimeter with a sodium lamp, you obtain an optical rotation of-31.2°. Calculate the optical purity and ratio of carvone enantiomers in your mixture given that the specific rotation of(-)-carvone is-62.5°at 20°C.

Science   Chemistry   
0 0
Add a commentTranscribed image text
Next >

Homework Answers

Answer #1

0 0
Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Log In

Sign Up

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
The specific rotation of (S)-carvone (at 20°C) is +61. A chemist prepared a mixture of (R)-carvone...
The specific rotation of (S)-carvone (at 20°C) is +61. A chemist prepared a mixture of (R)-carvone and its enantiomer, and this mixture had an observed rotation of -52°. (a) What is the specific rotation of (R)-carvone at 20°C? (b) Calculate the % ee of this mixture (c) What percentage of the mixture is (S)-carvone?
Specific rotation of L-alanine in water (at 25 °C) is +2.8. Suppose you have 3.00 g...
Specific rotation of L-alanine in water (at 25 °C) is +2.8. Suppose you have 3.00 g of mixture of L and D-alanine. You dissolved it in 10 mL of water, and measured rotation in 10 cm cell. The observed rotation was +0.12. Calculate the ee% for the mixture. How many grams of D- and L-alanine do you have in the sample? Optical purity (ee%) = observed specific rotation/ specific rotation of the pure enantiomer x 100= (+0.12 / +2.80 )...
A weather balloon contains 222 L of He gas at 20. °C and 760. mmHg. What...
A weather balloon contains 222 L of He gas at 20. °C and 760. mmHg. What is the volume of the balloon when it ascends to an altitude where the temperature is -40. °C and 540. mmHg? 1 What volume does 12.5 g of Ar gas at a pressure of 1.05 atm and a temperature of 322 K occupy? Would the volume be different if the sample were 12.5 g of He gas under the same conditions? How many moles...
Heat is the Total internal energy of an object Average kinetic energy of molecules Measure of...
Heat is the Total internal energy of an object Average kinetic energy of molecules Measure of potential energy of molecules Same thing as very high temperature The specific heat of copper is 0.093 cal/g⁰C, and the specific heat of aluminum is 0.22  cal/g⁰C. The same amount of energy applied to equal masses, say, 50 g of copper and aluminum, will result in A higher temperature for copper A higher temperature for aluminum The same temperature for each metal Unknown results The...
An experiment was carried out to measure the effect of growth hormone on girls affected by...
An experiment was carried out to measure the effect of growth hormone on girls affected by a growth disorder called Turner’s syndrome. A total 68 girls participated in the study. Half of the girls were placed into the treatment group; these girls were given the active drug. The other half of girls were placed into the control group and were given a placebo with no active ingredients. Their heights were measured at the time the hormone was first administered and...
What are standard conditions of ΔH° for the data you will use? Temperature 0 K 100...
What are standard conditions of ΔH° for the data you will use? Temperature 0 K 100 K 273 K 298 K Pressure 1.0 Pa 100 Pa 1.0 bar 100 bar Concentration 1.0 g/L 1.0 mol/L 1.0 mg/L mol/kg Select the complete reactions (including phases) for the reaction between solid NaOH and a solution of HCl. 2NaOH(s) + HCl(aq) → 2NaCl(aq) + H2O(l) NaOH(s) + HCl(aq) → NaCl(aq) + H2O(l) NaOH(s) + HCl(aq) → NaCl(s) + H2O(l) Calculate the theoretical ΔH°r...
When is a hypothesis considered scientific? a. when it is based on something other than observation...
When is a hypothesis considered scientific? a. when it is based on something other than observation b. when it can be tested and is refutable c. when it relies on anecdotal evidence d. when it relies on mystical explanations e. All hypotheses are considered scientific until experiments determine otherwise. 3. Of the following, which is the earliest step in the scientific process? a. generating a hypothesis b. analyzing data c. conducting an experiment d. drawing a conclusion e. developing a...
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT