8. An etching solution for silicon wafers is made up of four parts (by volume) of concentrated hydrofluoric acid to one part concentrated nitric acid to three parts concentrated acetic acid. The hydrofluoric acid is 49% (by mass) HF, and has s specific gravity of 1.198; the nitric acid is 70% HNO3, with a specific gravity of 1.413, and the acetic acid is pure CH3CO₂H with a specific gravity of 1.049. a. How many liters of each acid will be required to make up 100kg of etching solution? b. What is the molarity (moles per liter) of HF and HNO3 in the etching solution?
8. An etching solution for silicon wafers is made up of four parts (by volume) of concentrated hydrofluoric acid to one part concentrated nitric acid to three parts concentrated acetic acid. The hydrofluoric acid is 49% (by mass) HF, and has s specific gravity of 1.198; the nitric acid is 70% HNO3, with a specific gravity of 1.413, and the acetic acid is pure CH3CO₂H with a specific gravity of 1.049. a. How many liters of each acid will be required to make up 100kg of etching solution? b. What is the molarity (moles per liter) of HF and HNO3 in the etching solution?
Introduction to Chemical Engineering Thermodynamics
8th Edition
ISBN:9781259696527
Author:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Publisher:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Chapter1: Introduction
Section: Chapter Questions
Problem 1.1P
Related questions
Question
Transcribed Image Text:8. An etching solution for silicon wafers is made up of four parts (by volume) of
concentrated hydrofluoric acid to one part concentrated nitric acid to three parts
concentrated acetic acid. The hydrofluoric acid is 49% (by mass) HF, and has s specific
gravity of 1.198; the nitric acid is 70% HNO3, with a specific gravity of 1.413, and the
acetic acid is pure CH3CO₂H with a specific gravity of 1.049.
a. How many liters of each acid will be required to make up 100kg of etching
solution?
b. What is the molarity (moles per liter) of HF and HNO3 in the etching solution?
Expert Solution
This question has been solved!
Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.
This is a popular solution!
Trending now
This is a popular solution!
Step by step
Solved in 4 steps with 10 images
Recommended textbooks for you
Introduction to Chemical Engineering Thermodynami…
Chemical Engineering
ISBN:
9781259696527
Author:
J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Publisher:
McGraw-Hill Education
Elementary Principles of Chemical Processes, Bind…
Chemical Engineering
ISBN:
9781118431221
Author:
Richard M. Felder, Ronald W. Rousseau, Lisa G. Bullard
Publisher:
WILEY
Elements of Chemical Reaction Engineering (5th Ed…
Chemical Engineering
ISBN:
9780133887518
Author:
H. Scott Fogler
Publisher:
Prentice Hall
Introduction to Chemical Engineering Thermodynami…
Chemical Engineering
ISBN:
9781259696527
Author:
J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Publisher:
McGraw-Hill Education
Elementary Principles of Chemical Processes, Bind…
Chemical Engineering
ISBN:
9781118431221
Author:
Richard M. Felder, Ronald W. Rousseau, Lisa G. Bullard
Publisher:
WILEY
Elements of Chemical Reaction Engineering (5th Ed…
Chemical Engineering
ISBN:
9780133887518
Author:
H. Scott Fogler
Publisher:
Prentice Hall
Industrial Plastics: Theory and Applications
Chemical Engineering
ISBN:
9781285061238
Author:
Lokensgard, Erik
Publisher:
Delmar Cengage Learning
Unit Operations of Chemical Engineering
Chemical Engineering
ISBN:
9780072848236
Author:
Warren McCabe, Julian C. Smith, Peter Harriott
Publisher:
McGraw-Hill Companies, The