The pH of the given 0.050 M solution of Al ( NO 3 ) 3 is to be calculated. Concept introduction: The pH of a solution is define as a figure that expresses the acidity of the alkalinity of a given solution. The pH of a solution is calculated by the formula, pH = − log [ H + ] The sum, pH + pOH = 14 The equilibrium constant for water is denoted by K w and is expressed as, K w = [ H + ] [ OH − ] The value of K w is calculated by the formula, K w = K a ⋅ K b

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 14, Problem 127E

Interpretation Introduction

Interpretation: The $pH$ of the given $0.050 M$ solution of $Al(NO3)3$ is to be calculated.

Concept introduction: The $pH$ of a solution is define as a figure that expresses the acidity of the alkalinity of a given solution.

The $pH$ of a solution is calculated by the formula, $pH=−log[H+]$

The sum, $pH+pOH=14$

The equilibrium constant for water is denoted by $Kw$ and is expressed as,

$Kw=[H+][OH−]$

The value of $Kw$ is calculated by the formula,

$Kw=Ka⋅Kb$

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