When iron in the porphyrin ring is reduced from Fe 3+ to Fe 2+ , the changes in the porphyrin structure has to be accounted. Concept Introduction: Atomic radii: As the electron is added to the ion or neutral atom, size increases because electron–electron repulsion occurs and also effective nuclear charge decrease because due to addition of one more electron.

Question

(a 4 shows scanning electron microscope (SEM) images of extruded actions of packing bed for two capillary columns of different diameters, al 750 (bottom image) and b) 30-μm-i.d. Both columns are packed with the same stationary phase, spherical particles with 1-um diameter. A) When the columns were prepared, the figure shows that the column with the larger diameter has more packing irregularities. Explain this observation. B) Predict what affect this should have on band broadening and discuss your prediction using the van Deemter terms. C) Does this figure support your explanations in application question 33? Explain why or why not and make any changes in your answers in light of this figure. Figure 4 SEM images of sections of packed columns for a) 750 and b) 30-um-i.d. capillary columns.³

Answer 1

Question

Chapter 7.6, Problem 2.4ACP

Interpretation Introduction

Interpretation:

When iron in the porphyrin ring is reduced from Fe3+ to Fe2+, the changes in the porphyrin structure has to be accounted.

Concept Introduction:

Atomic radii: As the electron is added to the ion or neutral atom, size increases because electron–electron repulsion occurs and also effective nuclear charge decrease because due to addition of one more electron.

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