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CHEMISTRY LABORATORY I
Course Objective(s):
This course will enable the students to-
be acquainted with various safety measures and use of apparatus used in volumetric analysis and correct titrimetric procedure along with standard and nonstandard solutions.
Course Outcomes (COs):
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Course Outcomes |
Teaching Learning Strategies |
Assessment Strategies |
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On completion of this course, the students will be able to- CO11: apply the knowledge of lab safety measures during the experimental work. CO12: comprehend the concept of volumetric analysis including acid-base and redox titrations. CO13: develop the analytical skills to carry out different types of volumetric analysis. |
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Laboratory Safety measures
Handling of hazardous chemicals, incompatible chemicals, flammable solvents, fire hazards in chemical laboratory, control of fire, fire extinguishers, toxicity of chemicals, forms of toxic materials, personal protective equipment, health effects and first aid, MSDS (material safety data sheet), use of compressed gases, waste minimization strategies and chemical waste disposal, procedures for neutralization of strong acids and strong bases.
Volumetric Analysis
Classification and primary requirements of titrations, concept of normality and molarity.
Acid-base titrations: basic principle, neutralization indicators- types, theories of indicators, choice of indicators, titration curves and applications.
Redox titrations: Principle, indicators, and applications of permangnatometry, dichromatometry, iodometry titrations,redox equations, standard electrode potential and its application to inorganic reactions.
Calibration of fractional weights, pipettes and burettes, preparation of standard solutions, dilution – 0.1 M to 0.001 M solutions, buffer solutions.
Experiments:
- Estimation of carbonate and hydroxide present together in mixture.
- To determine the neutralization equivalent of an acid.
- Estimation of carbonate and bicarbonate present together in a mixture.
- Estimation of free alkali present in different soaps/detergents.
- Determination of acetic acid in commercial vinegar using NaOH.
- Estimation of Fe(II) using standardized KMnO4 solution.
- Estimation of oxalic acid and sodium oxalate in a given mixture.
- Estimation of Fe(II) with K2Cr2O7 using internal (diphenylamine, anthranilic acid)and external indicator.
- Estimation of ferrous and ferric ion by dichromate method.
- Advanced University Practical Chemistry, Part I, First Edition; P.C. Kamboj, Vishal Publishing House, New Delhi; 2013.
- 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.
SUGGESTED READINGS:
- Advanced Practical Inorganic Chemistry, Twenty Third Edition; Gurdeep Raj , Krishna Prakashan Media (P) Ltd, Meerut, 2013.
e-RESOURCES:
- https://chem.libretexts.org/Bookshelves/Analytical_Chemistry/Supplemental_Modules_(Analytical_Chemistry)/Quantifying_Nature/Volumetric_Chemical_Analysis_(Shiundu) (Volumetric Analysis)
- https://egyankosh.ac.in/simple-search?query=titration (Volumetric Analysis)
- https://egyankosh.ac.in/bitstream/123456789/43262/1/Unit-5.pdf (Lab Safety)
- https://www.chem.uci.edu/~ardo/echem/UCI-CHEM248-2020F_lecture04.pdf (Oxidation and Reduction)Scheme of Examination
Scheme of Examination
The duration of examination will be 5 hrs.
The following exercises will be set in the examination –
Quiz based on lab safety measures 10 marks
Volumetric Analysis
Acid-Base Titrations 22 marks
Redox Titrations 23 marks
Viva 15 marks
Total 70 marks
Quiz based on Lab Safety Measures
The Quiz will consist of 10 objective-type questions (Multiple Choice Questions/Fill in the blanks/One-word answer/True or False/Match the following etc.) carrying 1 mark each. The duration of the quiz will be 10 minutes.
Volumetric Analysis
Two volumetric exercises (one acid-base and one redox) will be given carrying 22 and 23 marks respectively. The distribution of marks will be as follows:
Four marks of each volumetric exercise will be reserved for the preparation of solutions, neat methodical and systematic working of the candidate.
The remaining 18/19 marks of each volumetric exercise will be distributed as follows:
Theory 4 marks
Correct observation and proper recording 4/5 marks
Use of correct formula and calculation 4 marks
Result 6 marks
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Percentage Error |
≤1.0 |
>1.0 &<1.5
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>1.5 &<2
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>2
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Marks Awarded |
6 |
4 |
2 |
0 |
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.
