Chemistry Laboratory XII

Paper Code: 
24CCHY613
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.

 

Course Outcomes: 

Course

Learning Outcome

(at course level)

Learning and Teaching Strategies

Assessment Strategies

Course Code

Course

title

 

24CCHY613

 

Chemistry Laboratory XII

(Practical)

 

CO145:Analyse and detect various  cations and anions in the presence of each other in a given mixture qualitatively.

CO146: Perform experiments based on spectrophotometry.

CO147: Prepare coordination complexes and study their kinetic and crystal field parameters.

CO148: Compile and report the results efficiently, and develop communications skills.

CO149: Contribute effectively in course-specific interaction.

Approach in teaching:

Power point presentation, 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.

 

 

 

Unit I: 

 

Theoretical Principles in Qualitative Analysis (H2S Scheme)

Basic principles involved in analysis of cations and anions and solubility products, common ion effect, principles involved in separation of cations into groups and choice of group reagents, interfering anions (fluoride, borate, oxalate and phosphate) and need to remove them after group II.

Qualitative semi-micro analysis of mixtures containing 3 anions and 3 cations:

CO32-, NO2-, S2-, SO32-, S2O32-, CH3COO-, F-, Cl-, Br-, I-, NO3-, BO33-, C2O42-, PO43-, NH4+, K+,Pb2+, Cu2+, Cd2+, Bi3+, Sn2+, Sb3+, Fe3+, Al3+, Cr3+, Zn2+, Mn2+, Co2+, Ni2+, Ba2+,Sr2+, Ca2+,Mg2+.

Mixtures should preferably contain one interfering anion, or insoluble component (BaSO4, SrSO4, PbSO4, CaF2 or Al2O3) or combination of anions e.g. CO32-and SO32-, NO2- and NO3-, Cl- and Br-, Cl- and I-, Br- and I-, NO3- and Br-, NO3- and I-.

Spot tests should be done whenever possible.

 

 

Spectrophotometry

  1. Measurement of 10 Dq by spectrophotometric method.
  2. Verification of spectrochemical series.
  3. Controlled synthesis of two copper oxalate hydrate complexes: kinetic vs thermodynamic factors.
  4. Preparation of acetylacetanato complexes of Cu2+/Fe3+. Find the λmax of the complex.
  5. Synthesis of ammine complexes of Ni(II) and its ligand exchange reactions (e.g. bidentate ligands like acetylacetone, DMG, glycine) by substitution method.

 

Scheme of Examination

 

The duration of examination will be 5 hrs.

The following exercises will be set in the examination

Qualitative Mixture Analysis                                                        36 marks

Spectrophotometry                                                                    19 marks

Viva                                                                                          15 marks

Total                                                                                   70 marks

           

Qualitative Mixture Analysis

An inorganic mixture having 6 radicals carries 36 marks.  Mixture should contain either one interfering radical or one insoluble.

6 marks shall be awarded for each radical correctly reported. The distribution of marks will be as follows-

2 marks will be awarded for each correct radical if only dry test or preliminary tests are   given. 2 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 2 mark is reserved for confirmatory test of radical.

 

 

 

 

Spectrophotometry

 

The exercise carries 19 marks. The distribution of marks will be as follows

Theory and procedure                                                               5 marks

Correct observation                                                                   5 marks

Use of correct formula and calculation                                        6 marks

Result                                                                                       3 marks

 

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.

 

Essential Readings: 
  1. Vogel's Qualitative Inorganic Analysis, Seventh Edition; G. Svelha, B. Sivasankar; Pearson Education India,2012.
  2. Advanced University Practical Chemistry, Part I, First Edition; P.C. Kamboj, Vishal Publishing House, New Delhi; 2013.

 

 

References: 
  1. Advanced Practical Inorganic Chemistry, Twenty Third Edition; Gurdeep Raj; Goel Publishing House, Meerut 2013.
  2. Semimicro Qualitative analysis, J.P. Tandon, Lal Manohar, R.K. Bansal; University of Rajasthan, Jaipur, 1979.

 

e-Resources:

  1. http://amrita.olabs.edu.in/?sub=73&brch=7&sim=31&cnt=7  (Mixture analysis)
  2. https://www.youtube.com/watch?v=qPjGbrd4nJw (Mixture analysis)
  3. https://www.youtube.com/watch?v=j3QOGgBIVYc (Preparation)

 

Academic Year: