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CHEMISTRY LABORATORY IV
Course Objective(s):
This course will enable the students to–
extend the concepts of thermochemistry for calculating the thermodynamic parameters of different systems using suitable techniques.
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- CO33: determine enthalpy of neutralization ionization and hydration for different combinations of acid and bases. CO34: determine the solubility of benzoic acid. |
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Thermochemistry
- Determination of heat capacity of a calorimeter for different volumes using change of enthalpy data of a known system (method of back calculation of heat capacity of calorimeter from known enthalpy of solution or enthalpy of neutralization).
- Determination of heat capacity of the calorimeter and enthalpy of neutralization of hydrochloric acid with sodium hydroxide.
- Calculation of the enthalpy of ionization of ethanoic acid.
- Determination of heat capacity of the calorimeter and integral enthalpy (endothermic and exothermic) solution of salts.
- Determination of basicity/proticity of a polyprotic acid by the thermochemical method in terms of the changes of temperatures observed in the graph of temperature versus time for different additions of a base. Also calculate the enthalpy of neutralization of the first step.
- Determination of enthalpy of hydration of copper sulphate.
- Study of the solubility of benzoic acid in water and determination of ∆H.
Any other experiment related to thermochemistry and equilibria can be carried out in the class.
- Advanced Practical Physical Chemistry; Eighteenth Edition; J.B.Yadav; Goel Publishing House, Meerut, 2015.
- Advanced University Practical Chemistry, Part I, First Edition; P.C. Kamboj, Vishal Publishing House, New Delhi; 2016.
SUGGESTED READINGS:
- Experimental Physical Chemistry, First Edition; V. D. Athawale and P. Mathur; New age International (P) Ltd. Publishers, New Delhi, 2011.
e-RESOURCES:
- https://vlab.amrita.edu/index.php?sub=2&brch=190&sim=1546&cnt=1 (Calorimetry -Heat of Neutralization)
- https://www.youtube.com/watch?v=S9D6tWM49uM (Enthalpy of Neutralization of SA & SB)
- https://www.youtube.com/watch?v=vV6XnG4Sl8I (Determination of Solubility of benzoic acid and heat of dissolution)
- https://www.youtube.com/watch?app=desktop&v=KsmF4Ff6OBA (Determine Enthalpy of Copper Sulphate)
Scheme of Examination
The duration of examination will be 5 hrs.
The following exercises will be set in the examination
Physical Chemistry Experiments (two)
Experiment I 27 marks
Experiment II 28 marks
Viva 15 marks
Total 70 marks
The exercise carries 27 marks / 28 marks. The exercises in Physical chemistry can be modified by the examiners and the same will be explained to the candidates. However, such modifications will not involve any departure from the basic principles over which experiments are prescribed in the syllabus.
Candidates shall be given two exercise out of the exercises prescribed in the syllabus. Four marks shall be awarded for preparatory work, setting up of an apparatus, neat and methodical work.
Twenty three / Twenty four marks will be awarded for theory and procedure, correct observation and proper recording, use of correct formula, calculation and result within permissible limits.The distribution of marks will be as follows:
Theory and procedure 6 marks
Correct observation and proper recording 5 marks
Use of correct formula and calculation 6 marks
Result 6 marks / 7 marks
The permissible limit will be decided by the examiner as it varies with the nature of the experiment.
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.
