Analytical Chemistry For Technicians I at Southeast Community College
Instructor: John Kenkel
Mr. Kenkel's Phone Number: 402-437-2485
Mr. Kenkel's email addresses: jkenkel@southeast.edu and jkenkel@aol.com
Textbook: Anaytical Chemistry For Technicians, 3rd Edition, by John Kenkel, CRC Press
Schedule:
Week 1: Introduction to Analytical Science, Chapter 1
Weeks 1, 2, 3: Gravimetric Analysis, Chapter 3
Week 3: Sampling and Sample Preparation, Chapter 2
Weeks 4, 5, 6: Introduction to Titrimetric Analysis, Chapter 4
Weeks 6, 7, 8, 9: Applications of Titrimetric Analysis, Chapter 5
Quiz to prior to each exam.
Exams covering Chapters 1, 2, and 3; Chapter 4, and Chapter 5
Final exam is comprehensive.
Answers to Sample Exam 1, April 16, 2005
1. Qualitative analysis. The presence of the analyte was reported and not the quantity.
2a. A "representative sample" is a sample that has all the characteristics in the same proportions as the bulk system that is under investigation. The "chain of custody" refers to the complete documentation of who handles samples and in what capacity from when the sample is first taken at the sampling site until it is in the laboratory.
2b. 49.84 %
2c. Hydrochloric acid, blue
2d. 35.12 %
2e. "Accuracy" refers to how close a laboratory result or series of results agrees with the right answer. Precision refers to how close the results of a series of identical tests agree with each other.
3a. 12.47 %
3b. Nitric acid, turns skin yellow.
4. 0.7206 g
5. 0.26 %
6. Higher. The recorded weight includes both what is in the beaker and what is on the towel.