Chemistry Laboratory IV

Paper Code: 
C-CHY 402
Credits: 
2
Contact Hours: 
60.00
Max. Marks: 
100.00
Objective: 

Course Objective(s):
This course will enable the students to -

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

Course Outcomes (COs):

Course Outcomes

Teaching Learning Strategies

Assessment

Strategies

On completion of this course, the students will be able to-

 

CO33: analyse and detect various cations and anions in the presence of each other in a given mixture qualitatively.

CO34: determine the percentage composition of non interacting systems by viscosity and surface tension method.

CO35: calculate rate constant of different reactions.

 

  • Laboratory instructions and Demonstrations

 

 

•    Conduction of Experiments
•    Lab Records
•    Viva voce

 

30.00
Unit I: 

Inorganic Chemistry
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)

 

Quantitative Estimation

1. Estimate the amount of nickel present in a given solution as bis (dimethylglyoximato) nickel(II) or aluminium as oximate in a given solution gravimetrically.

2. Draw calibration curve (absorbance at λmax vs. concentration) for various concentrations of a given coloured compound (KMnO4/ CuSO4) and estimate the concentration of the same in a given solution.

 

30.00

Physical Chemistry
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:

  1. Acid hydrolysis of methyl acetate with hydrochloric acid.
  2. Saponification of ethyl acetate.
  3. Compare the strengths of HCl and H2SO4 by studying kinetics of hydrolysis of methyl acetate

 

Essential Readings: 
  • 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.
  • Vogel's Qualitative Inorganic Analysis, Seventh Edition; G. Svelha, B. Sivasankar; Pearson Education India,2012.

 

References: 

SUGGESTED READINGS:

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

  e-RESOURCES:

 

Scheme of Examination

  The duration of examination will be 4 hrs.
The following exercises will be set in the examination

 

Qualitative Mixture 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.

Eight marks shall be awarded for each radical correctly reported.

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

confirmatory test of radical.

2. 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.

 

3. 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.

 

 

 

 

Academic Year: 
2023-2024
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