Chapter 3, Problem 3.38P

Interpretation Introduction

(a)

Interpretation:

The molarity of sulfuric acid solution should be calculated.

Concept introduction:

The molarity of a solution is defined as number of moles of solute in 1 L of solution. It is mathematically represented as follows:

$M=\frac{n}{V}$

Here, n is number of moles of solute, V is volume of solution in L.

Number of moles can be calculated from mass and molar mass of a substance as follows:

$n=\frac{m}{M}$

Here, m is mass and M is molar mass.

Interpretation Introduction

(b)

Interpretation:

The time to fill a 55-gallon drum and the sulfuric acid contained in the drum should be calculated.

Concept introduction:

Time can be calculated from volume and flow rate as follows:

$t=\frac{V}{V_{\text{flow rat}e}}$

Here, V is volume of drum and $V_{\text{flow rat}e}$ is flow rate of sulfuric acid.

The mass of any substance can be calculated from its density as follows:

$m=d\times V$

Here, m is mass, d is density and V is volume.

Interpretation Introduction

(c)

Interpretation:

Estimate the time it takes the solution to flow from the pipe inlet to the outlet.

Concept introduction:

The mean velocity of a pipe can be calculated from the following formula:

$v=\frac{V_{\text{flow rate}}}{A}$

Here, $V_{\text{flow rate}}$ is volumetric flow rate and A is cross sectional area.