Chemistry Laboratory IV

Paper Code: 
24CCHY402
Credits: 
2
Contact Hours: 
60.00
Max. Marks: 
100.00
Objective: 

This course will enable the students to

understand the concept of separation of mixtures containing metal ions and acquire knowledge of chemical kinetics and properties of liquid (surface tension and viscosity).

 

Course Outcomes: 

Course

Learning Outcome

(at course level)

Learning and Teaching Strategies

Assessment Strategies

Course Code

Course

Title

 

24CCHY 402

 

 

 

Chemistry Laboratory IV

 (Practical)

 

CO43: Analyse and detect various cations and anions in the presence of each other in a given mixture qualitatively.

CO44: Determine the percentage composition of non-interacting systems by viscosity and surface tension method.

CO45: Calculate rate constant of different reactions.

CO46: Compile and report the results efficiently, and develop communications skills.

CO47: Contribute effectively in course-specific interaction.

Approach in teaching:

Laboratory instructions and

demonstrations.

 

Learning activities for the students:

Peer learning, hands-on-learning,

interpretation of data, record writing and learning through virtual labs.

Conduction of experiments, lab records, viva voce and quiz.

 

 

Unit I: 

Inorganic Chemistry                                                                         (30 Hours)

Mixture Analysis:                                                                              

Semi-micro qualitative analysis of inorganic mixtures (Two anions and two cations, excluding insoluble salts):

Cations : NH4+, Pb2+, Ag+, Bi3+, Cu2+, Cd2+, Sn2+, Fe3+, Al3+, Co2+, Cr3+, Ni2+, Mn2+, Zn2+, Ba2+, Sr2+, Ca2+, K+

Anions : CO32– , S2–, SO2, S2O32–, NO3, CH3COO, Cl, Br, I, NO3,SO42-, PO43-, BO33-,C2O42-,F-

(Spot tests should be carried out wherever feasible)

 

Physical Chemistry                                                                         (30 Hours)

1. Surface tension measurement (use of organic solvents excluded).

a) Determination of the surface tension of a liquid or a dilute solution using a

stalagmometer.

b) Study of the variation of surface tension of a detergent solution with concentration.

2.Viscosity measurement (use of organic solvents excluded).

a) Determination of the relative and absolute viscosity of a liquid or dilute solution

using an Ostwald’s viscometer.

b) Study of the variation of viscosity of an aqueous solution with concentration of

solute.

3. Chemical Kinetics

Study the kinetics of the following reactions.

a) Initial rate method: Iodide-persulphate reaction

b) Integrated rate method:

i. Acid hydrolysis of methyl acetate with hydrochloric acid.

ii. Saponification of ethyl acetate.

iii. Compare the strengths of HCl and H2SO4 by studying kinetics of hydrolysis of

methyl acetate

 

Scheme of Examination

  The duration of examination will be 4 hrs.

The following exercises will be set in the examination

Qualitative  Analysis                                                      32 marks

Physical experiment                                                       26 marks

Viva                                                                              12 marks

          Total                                                                                      70 marks       

  1. Qualitative Mixture Analysis

 

The exercise carries 32 marks. Not more than one interfering radical will be given in a mixture of four    radicals.

8 marks shall be awarded for each radical correctly reported.

2 marks will be awarded for each correct radical if only dry test or preliminary tests are   given.

4 marks may be awarded to a candidate if she has approached in systematic and correct manner towards the analysis upto a group in analysis of basic radical or correct indicative test of acid radical. Remaining two mark is reserved for confirmatory test of radical.

 

  1. Physical Chemistry Experiment

The exercise carries 26 marks. The candidates shall be given one exercise out of exercises prescribed in the syllabus. The exercises in physical chemistry can be modified by the examiner 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.

 

      The distribution of marks will be as follows

 

  • Theory and procedure                     4 marks
  • Correct observation                         7 marks
  • Use of correct formula                     4 marks
  • Calculation                                      7 marks
  • Result                                             4 marks

 

The constancy in values of rate constants may be taken into consideration while awarding marks in experiments on chemical kinetics.

  1. 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 understanding the basic principles.

 

Essential Readings: 
  1. Advanced Practical Physical Chemistry, Eighteenth Edition; J.B. Yadav; Goel Publishing House, Meerut, 2015.
  2. Advanced University Practical Chemistry, Part I, First Edition; P.C. Kamboj, Vishal Publishing House, New Delhi; 2016.
  3. Vogel's Qualitative Inorganic Analysis, Seventh Edition; G. Svelha, B. Sivasankar; Pearson Education India,2012.

 

References: 
  1. Semi-micro Qualitative analysis, J.P. Tandon, Lal Manohar, R.K. Bansal; University of Rajasthan, Jaipur,1979.
  2. Experimental Physical Chemistry, First Edition; V. D. Athawale, P. Mathur; New Age International (P) Ltd. Publishers, New Delhi, 2011.

 

 e-Resources:

  1. http://amrita.olabs.edu.in/?sub=73&brch=7&sim=31&cnt=7  (radicals)
  2. https://www.fpharm.uniba.sk/fileadmin/faf/Pracoviska-subory/KFCHL/ENG/lectures/Physics/AP11__Surface_tension.pdf            (surface tension)
  3. https://www.youtube.com/watch?v=8Op4XjLERj8            (kinetics)
  4. https://vlab.amrita.edu/index.php?sub=2&brch=190&sim=339&cnt=1        (viscosity)

 

 

Academic Year: