A mixture of n-heptane, tetrahydrofurane, 2-butanone, and n-1propanol elutes in this order when using a polar stationaryphase such a Carbowax. The elution order is exactly the oppositewhen using a nonpolar stationary phase such aspolydimethylsiloxane. Explain the order of elution in each case.2The molar solubility of pbBr2 is 0.01M. Calculate kspfor pbBr2.The cell (Ag/AGCI ref // SO4-2, PbSO4(s)/Pb) wasfound to have a potential of -0.561V. Calculate theconcentration of SO4-2 in the cell given:PbSO4(s) + 2e- O Pbis) + SO4-2 E= -0.350v3.Note: E A/AgCi ref = 0.1970vWhy it's not necessary to use Quartzcuvette in this experiment?41-Write the full words for the followingacronyms:• VR:• ISC:•EC:What is the difference between the excitationand emission spectrum?

A mixture of n-heptane, tetrahydrofurane, 2-butanone, and n- propanol elutes in this order when using a polar stationary phase such a Carbowax. The elution order is exactly the opposite when using a nonpolar stationary phase such as polydimethylsiloxane. Explain the order of elution in each case.

A mixture of n-heptane, tetrahydrofurane, 2-butanone, and n- propanol elutes in this order when using a polar stationary phase such a Carbowax. The elution order is exactly the opposite when using a nonpolar stationary phase such as polydimethylsiloxane. Explain the order of elution in each case.

Macroscale and Microscale Organic Experiments

7th Edition

ISBN:9781305577190

Author:Kenneth L. Williamson, Katherine M. Masters

Publisher:Kenneth L. Williamson, Katherine M. Masters

Chapter7: Extraction

Section: Chapter Questions

Problem 1Q

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Question

A mixture of n-heptane, tetrahydrofurane, 2-butanone, and n-
1
propanol elutes in this order when using a polar stationary
phase such a Carbowax. The elution order is exactly the opposite
when using a nonpolar stationary phase such as
polydimethylsiloxane. Explain the order of elution in each case.
2
The molar solubility of pbBr2 is 0.01M. Calculate ksp
for pbBr2.
The cell (Ag/AGCI ref // SO4-2, PbSO4(s)/Pb) was
found to have a potential of -0.561V. Calculate the
concentration of SO4-2 in the cell given:
PbSO4(s) + 2e- O Pbis) + SO4-2 E= -0.350v
3.
Note: E A/AgCi ref = 0.1970v
Why it's not necessary to use Quartz
cuvette in this experiment?
4
1-Write the full words for the following
acronyms:
• VR:
• ISC:
•EC:
What is the difference between the excitation
and emission spectrum?

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