Whether the reaction that occurs when aluminum shavings are dropped into a solution of copper ( II ) nitrate is an example of redox reaction or precipitation reaction is to be predicted based on the activity series and solubility guidelines. The net ionic equation is to be stated. Concept introduction: Metals are tabulated in decreasing order of their reducing power or increasing order of their oxidizing power. The table is termed as activity series. Any element in the activity series will replace the ions of the elements from a solution written below it. If the product formed is an insoluble compound, the reaction is termed as precipitation reaction. If the elements in the reactants undergo oxidation and reduction, the reaction is termed as redox reaction.

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

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Question

Chapter 9, Problem 77E

Interpretation Introduction

Interpretation:

Whether the reaction that occurs when aluminum shavings are dropped into a solution of copper (II) nitrate is an example of redox reaction or precipitation reaction is to be predicted based on the activity series and solubility guidelines. The net ionic equation is to be stated.

Concept introduction:

Metals are tabulated in decreasing order of their reducing power or increasing order of their oxidizing power. The table is termed as activity series. Any element in the activity series will replace the ions of the elements from a solution written below it. If the product formed is an insoluble compound, the reaction is termed as precipitation reaction. If the elements in the reactants undergo oxidation and reduction, the reaction is termed as redox reaction.

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