Coming soon
Chemistry Laboratory VII
This course will enable the students to
· understand the concept of quantitative gravimetric analysis method and learn about the method of preparation of inorganic coordination compounds.
· gain an in-depth knowledge of various chromatographic techniques.
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Course |
Learning Outcome (at course level) |
Learning and Teaching Strategies |
Assessment Strategies |
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|---|---|---|---|---|
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Course Code |
Course title |
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25CCHY413
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Chemistry Laboratory VII (Practical)
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CO74: Estimate the amount of metal ions quantitatively using gravimetric method. CO75: Prepare simple coordination compounds. CO76: Separate ions by TLC and ascending paper chromatography and identify their Rf value. CO77: Compile and report the results efficiently, and develop communications skills. CO78: Contribute effectively in course-specific interaction. |
Approach in teaching: Power point presentation, laboratory instructions and demonstrations.
Learning activities for the students: Peer learning, hands-on-learning, interpretation of data, record writing and learning through virtual labs.
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Conduction of experiments, lab records, viva voce.
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Gravimetric Analysis
· Estimation of nickel (II) using Dimethylglyoxime (DMG).
· Estimation of copper as CuSCN.
· Estimation of iron as Fe2O3 by precipitating iron as Fe(OH)3.
· Estimation of Al (III) by precipitating with oxine and weighing as Al(oxine)3 (aluminiumoxinate).
Inorganic Preparations
· Tetraamminecarbonatocobalt (III) nitrate
· Preparation of prussian blue Fe4[Fe(CN)6]3
· Preparation of cis and trans-bisoxalatodiaquachromate (III)
· Preparation of bis-Dimethylglyoxime-nickel (II)
· Preparation of chloropentamminecobalt (III)chloride
Chromatography of Metal Ions
Theory: Principles involved in various chromatographic separations.
Experiments: Paper chromatographic separation of following metal ions:
· Ni (II) and Co (II)
· Fe (III) and Al (III)
Essential Readings:
1. Vogel’s Textbook of Quantitative Chemical Analysis, Sixth Edition; M. Thomas; B. Sivasankar, J. Mendham; R.C. Denney; J. D. Barnes; Pearson Education, New Delhi, 2009.
2. Advanced Practical Inorganic Chemistry, Twenty Third Edition; Gurdeep Raj, Goel Publishing House, Meerut, 2013.
Suggested Readings:
1. Advanced University Practical Chemistry, Volume I, First Edition; P.C. Kamboj; VishalPublishing Co, New Delhi, 2013.
e-Resources:
1. https://vlab.amrita.edu/?sub=3&brch=193&sim=348&cnt=1 (Gravimetric analysis)
2. https://www.youtube.com/watch?v=1LxH8j8piwU (Gravimetric analysis)
3. https://www.youtube.com/watch?v=HZSKLXD82xo (Inorganic preparation)
4. https://www.youtube.com/watch?v=e58vR7ttb-w (Inorganic preparation)
5. https://www.youtube.com/watch?v=ej2zXOwASVI (Chromatographic separation)
Scheme of Examination
The duration of examination will be 5 hrs.
The following exercises will be set in the examinations
Gravimetric analysis 30 marks
Inorganic Preparation 15 marks
Chromatographic separation 10 marks
Viva 15 marks
Total 70 marks
Gravimetric analysis
The exercise carries 30 marks. 5 marks shall be as awarded to a candidate for a neat, methodical and systematic work.
The remaining 25 marks will be distributed as follows:
Theory 5 marks
Correct observation and proper recording 5 marks
Use of correct formula and calculation 3 marks
Result 12 marks
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% Error |
Marks |
% Error |
Marks |
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1.0 |
12 |
1.7 |
5 |
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1.1 |
11 |
1.8 |
4 |
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1.2 |
10 |
1.9 |
3 |
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1.3 |
9 |
2.0 |
2 |
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1.4 |
8 |
2.1 |
1 |
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1.5 |
7 |
2.2 |
0 |
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1.6 |
6 |
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Inorganic synthesis
This exercise carries 15 marks. 4 marks are reserved for neat, methodical and systematic working. The exercise amongst the candidates will be allotted by lot.
The yield, purity and proper presentation of the compound shall be taken into account while awarding marks.
Chromatographic Techniques
One chromatographic separation of 10 marks will be given. The distribution of marks is as follows:
Theory and procedure 3 marks
Preparation of solutions 2 marks
Observation 3 marks
Result 2 marks
Viva
Oral questions shall generally be asked over the work assigned to the candidate. The purpose is to find out as to what extent the candidate has understood the basic principles.
