Chapter 23, Problem 23.DE

(a)

Interpretation Introduction

Interpretation:

The number of plates $\left(\text{N}\right)$ has to be calculated.

Concept introduction:

Plates of column:

The relationship between $\text{N}\text{and}\text{w}$ is given by

$\begin{array}{l}\text{N}\text{=}\frac{\text{16}{\text{t}}_{\text{r}}{}^{\text{2}}}{{\text{w}}^{\text{2}}}\\ \text{Where,}\\ \text{N}\text{-}\text{number}\text{of}\text{plates}\text{on}\text{column}\\ {\text{t}}_{\text{r}}\text{-}\text{retention}\text{time}\\ \text{w}\text{-}\text{width}\end{array}$

(b)

Interpretation Introduction

Interpretation:

The width expected at half-height has to be given.