The density and molality of the nitric acid solution are to be calculated. Concept introduction: Molality ( m ) is calculated by dividing the moles of solute by Kg of solvent. The density is defined as ratio between mass and volume of a particular substance. When a solution’s concentration is represented as moles of solute per litre of solution, it is known as molarity.

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 13, Problem 111AP

Interpretation Introduction

Interpretation:

The density and molality of the nitric acid solution are to be calculated.

Concept introduction:

Molality (m

) is calculated by dividing the moles of solute by Kg of solvent.

The density is defined as ratio between mass and volume of a particular substance.

When a solution’s concentration is represented as moles of solute per litre of solution, it is known as molarity.

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(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

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