This course gives students an opportunity to improve techniques in chemistry experiments acquired in Chemistry Experiment 1 and to learn additional concept of chemistry introduced in four basic science courses. Students in each class take six subjects concerning inorganic, organic, analytical and physical chemistry through two quarters. Every subject consists of lecture and exercise before the experiment and submission of report after the experiment to facilitate students’ understanding of background chemistry in the subject.
This course focuses not only on the techniques in chemistry experiments, but also on treatment of experimental data, preparation of clear-cut reports, consideration for safety and environment, and further learning of basic chemistry through the experience.
At the end of this course, students will be able to:
1) Understand the basic chemistry of each subject and answer the exercises before each experiment.
2) Make precise measurements required in chemistry experiment.
3) Make appropriate operations considering the safety and environment.
4) Analyze experimental data in a rational manner and write a clear-cut report.
absorption spectrum, pigment, recrystallization, pseudo-first-order reaction, rate constant, para-nitro acetanilide, ortho-para orientation, indicator, dissociation constant, Fehling’s reaction, optical rotation, flavonoid, phenolic hydroxyl group
|Intercultural skills||Communication skills||Specialist skills||Critical thinking skills||Practical and/or problem-solving skills|
Following the procedures below, it takes 2-3 weeks to go through one subject.
①Lecture covering background chemistry about the substance, reaction, measurement, etc. in each subject.
②Submission of answer for exercise.
③Preparation of experiment notebook, where a student describes procedures of the experiment.
④Explanation of precautions, experiment, discussion with TA after the experiment.
⑤Preparation and submission of report.
Standard schedule: ①②③ in the first week, ④in the second (～4th) week, ⑤in the third (～5th) week
|Course schedule||Required learning|
|Class 1||At first, an orientation is held about schedule and safety of the laboratory and how to use basic lab ware. Then, fundamental and common techniques in laboratory are introduced, followed by the explanations of how to use instrumentals. Six subjects shown below are included. The order of subjects depends on the class. (a) Relation between color and absorption spectra Measurement of absorption spectra of cyanine pigment by spectrophotometer. (b) First-order rate constant Determination of the rate constant for HCl-catalyzed hydrolysis of ethyl acetate. (c) Synthesis of p-nitro acetanilide Synthesis of p-nitro acetanilide through the acetylation and nitration of aniline. (d) Determination of dissociation constant by spectrophotometer Determination of dissociation constant of indicator molecules by visible absorption spectra. (e) Chemistry of sugar Test reactions of sugar molecules and measurement of optical rotation during its hydrolysis. (f) Chemistry of flavonoid Extraction of flavonoid from orange coat and its test reactions.||(a) Discuss change in the color of molecule with absorption wavelength and length of conjugated double bond. (b) Determination of rate constant of pseudo-first-order reaction with the knowledge of kinetics. (c) Discuss on ortho-para orientation, role of protecting group and electrophilic substitution reaction. (d) Understand the relation between absorbance and concentration of chemical species. (e) Determination of rate constant for hydrolysis of sucrose from the change in optical rotation. (f) Assignment of functional groups in the extracted molecules by some chemical reactions.|
Student’s course scores are based on their understanding and performance of each item below and they will be assessed on the sum of the scores;
attendance to the lecture and exercise and achievement of exercise (20%), attendance to the experiment and performance (30%), waste treatment and cleanup (20%), discussion and report (30%).
No submission of report is considered as absence from the experiment. Students who are absent from experiments of two or more subjects fail the course.