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.

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Chapter1: Chemical Foundations
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Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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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?
Transcribed Image Text: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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