*expand_more*

*expand_more*

*format_list_bulleted*

A dilute aqueous solution of H_{2}SO_{4} (Solution A) is to be mixed with a solution containing 90.0 wt% H_{2}SO_{4} (Solution B) to produce a 75.0 wt% solution (Solution C).

The flow rate and concentration of Solution A change periodically, so that it is necessary to adjust the flow rate of Solution B to keep the product H_{2}SO_{4} concentration constant.

Flowmeters A and B have linear calibration plots of mass flow rate *(m) *versus meter reading (/?),

which pass through the following points: | ||

Flowmeter A: | m_{A} = 150 lb_{n},/h, wa = 500 lb_{m}/h. |
«a = 25 «a = 70 |

Flowmeter B: | riiB = 200 lbm/h, m800 lb_{B}= _{m}/h. |
Rb = 20 /?_{B} = 60 |

The analyzer calibration is a straight line on a semilog plot of %H_{2}SO_{4}(x) on a logarithmic scale versus meter reading (/?,) on a linear scale. The line passes through the points (x = 20%, *R _{x}*= 4.0) and (x = 100%./?, = 10.0).

- Calculate the flow' rate of Solution B needed to process 300 lb
_{m}/h of*55%*H_{2}SO_{4}(Solution A), and the resulting flow rate of Solution C. (The calibration data are not needed for this part.) - Derive the calibration equations for /ha(#a). «ib(^b), andx(/?
_{v}). Calculate the values of*R\, Ru,*and*R*corresponding to the flow rates and concentrations of Part (a)._{x} - The process technician's job is to read Flowmeter A and the analyzer periodically, and then to adjust the flow rate of Solution B to its required value. Derive a formula that the technician can use for
*R*in terms of_{b}*R*and_{A}*R*and then check it by substituting the values of Part (a)._{x},

Learn your wayIncludes step-by-step video

*schedule*05:29

# Chapter 4 Solutions

Elementary Principles of Chemical Processes, Binder Ready Version

#### Additional Engineering Textbook Solutions

Process Dynamics and Control, 4e

Elements of Chemical Reaction Engineering (5th Edition) (Prentice Hall International Series in the Physical and Chemical Engineering Sciences)

Concepts Of Programming Languages

Management Information Systems: Managing The Digital Firm (16th Edition)

Heating Ventilating and Air Conditioning: Analysis and Design

INTERNATIONAL EDITION---Engineering Mechanics: Statics, 14th edition (SI unit)