Chemistry Laboratory VII

Paper Code: 
24DCHY704
Credits: 
2
Contact Hours: 
60.00
Max. Marks: 
100.00
Objective: 

This course will enable the students to

understand about the different concepts behind the gravimetric and volumetric techniques and its uses in separation of different metal ions from a given mixture and develop experimental skills through spectrophotometer for measuring composition of complexes.

 

Course Outcomes: 

Course

Learning Outcome

(at course level)

Learning and Teaching Strategies

Assessment Strategies

Course Code

Course

Title

24DCHY

704

 

Chemistry Laboratory VII

(Practical)

 

 

CO111: Apply the knowledge of volumetric and gravimetric techniques in separation and estimation of the amount of different metal ions present in the mixture.

CO112: Determine stability constant, formation constant  and composition of complexes spectrophotometrically.

CO113: Compile and report the results efficiently and develop communication skills.

CO114: 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: 

Quantitative Analysis

Gravimetric  Analysis

i.    Separation and determination of two metals Ni-Zn, Cu-Fe and Cu-Ba involving volumetric and gravimetric methods.

 Volumetric Analysis

ii.    Separation and determination of three component mixture (one volumetrically and two gravimetrically, any two)

  1. Pb+2, Zn+2, Cu+2
  2. Zn+2, Cu+2,Fe+2
  3. Cu+2 Fe+2, Ni+2
  4. Cu+2, Ni+2, Mg+2

 

Spectrophotometry

1.  Determination of composition of iron-phenanthroline complex by

  1. Mole ratio method
  2. Job’s method of continuous variation

2. To determine the stability constant of FeSCN+2 complex/ Fe(III)-salicylic acid/iron-phenanthroline complex/ zirconium alizarin red-S complex spectrophotometrically.

 

Scheme of Examination

The duration of examination will be 6 hrs.

The following exercises will be set in the examination

Quantitative Analysis                           30 marks

Spectrophotometry                             25 marks

Viva                                                   15 marks

              Total                                                 70 marks      

1. Quantitative Analysis

This exercise is separation and determination of two metals which involves volumetric and gravimetric methods. It carries 30 marks out of which gravimetric estimation carries 15 marks whereas 15 marks are for volumetric estimation.

The distribution of marks in both cases are given as under:

 

   Gravimetric Estimation

% Error                      Marks awarded

1.0                               15

1.1                               13

1.2                               11

1.3                               9

1.4                               7

1.5                               5

1.6                               3

>1.7                             0

 

 

Volumetric Estimation

% Error                      Marks awarded

1.5                               18

1.6                               16

1.7                               14

1.8                               12

1.9                               10

2.0                               8

2.1                               6

2.2                               4

2.3                               2

2. Spectrophotometry

The exercise carries 25 marks, 5 marks shall be awarded for preparatory work, setting up of an apparatus, neat and methodical work.

20 marks will be awarded for correct observation, use of correct formula, calculation and result within permissible limits.

  • Theory and procedure                                                               6 marks
  • Correct observation and proper recording                                 7 marks
  • Use of correct formula and calculation                                      7 marks
  • Result                                                                                       5 marks

The permissible limit will be decided by the examiner as it varies with the nature of experiment.

 

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.

 

 

 

 

 

 

 

 

 

 

Essential Readings: 
  1. Vogel's Qualitative Inorganic Analysis, Seventh Edition; G. Svelha, B. Sivasankar; Pearson Education India, New Delhi, 2012
  2. 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.

 

References: 
  1. Advanced Practical Chemistry, First Edition; S. C. Das; Calcutta Publishing, Calcutta, 2000.

 

e-Resources:

  1. https://egyankosh.ac.in/bitstream/123456789/15906/1/Experiment-17.pdf (Gravimetric and Volumetric Analysis
  2. http://www.pca.ac.in/uploaded_files/M.Sc%20CH-I-1%20Practical%20Manual.pdf (Gravimetric and Volumetric Analysis
  3. https://www.yumpu.com/en/document/read/26115475/experiment-2-determination-of-the-composition-of-iron- (Job’s Method)
  4. https://pdfcoffee.com/report-inorgchem-determination-of-mole-ratio-of-iron-pdf-free.html (Mole ratio method)
  5. https://www.youtube.com/watch?v=tbV6QZPG2dg (stability constant)
  6. https://chem.libretexts.org/Courses/University_of_Arkansas_Little_Rock/General_Chemistry_Lab_(Fall_2021)/08%3A_Formation_Constants/8.2%3A_Lab_-_Formation_Constants_and_Complex_Ions (stability constant)

 

Academic Year: 
2024-2025
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