Inorganic Chemistry Lab I

Laboratory Safety measures                                                                                                

Safe working procedure and protective environment, protective apparel, emergency procedure and first aid, safe storage and use of hazardous chemicals. Procedure for working with gases above or below atmospheric pressure, safe storage and disposal of waste chemicals, recovery, recycling and reuse of laboratory chemicals, neutralization of strong acids and strong bases, procedure for laboratory disposal of explosives.

MSDS, identification, verification and segregation of laboratory waste, disposal of waste in sanitary sewer system, incineration and transportation of hazardous chemicals. Flammable solvents, fire hazards in chemical laboratory.

Qualitative Mixture Analysis                                                                                                               

Analysis of mixture for eight radicals (cations and anions) including

1. Less common metal ions - Mo, W, Ti, Zr, Th, V, U (two metal ions in cationic/anionic forms).
2. Insolubles –oxides, sulphates and halides.
3. Interfering - oxalate, phosphate, borate, fluoride.

Quantitative Analysis: Volumetric Analysis (any three)

1. Determination of chloride ion in water by Mohr’s method or by use of adsorption indicator.
2. Determination of nickel using Eriochrome Black T as an indicator (Back titration).
3. Determination of percentage purity of boric acid.
4. Determination of nitrite in a given sample.

Scheme of Examination

The duration of the examination will be 6 hrs.

The following exercises will be set in the examination

Lab Safety Quiz                                                             10 marks  

Qualitative Mixture Analysis                                            32 marks

Volumetric Analysis                                                        13 marks

Viva                                                                              15 marks

Total                                                                            70 marks

1.Qualitative Mixture Analysis

The exercise carries 32 marks. Not more than one interfering radical, rare metal as anion and an insoluble will be given in a mixture of eight radicals.

1 mark shall be awarded for each radical correctly reported and properly recorded. 1 mark will be awarded for each correct radical if only dry test or preliminary tests are given. 1 mark 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 1 mark is reserved for confirmatory test of radical.

2.Volumetric Exercise

The exercise carries 13 marks. The distribution of marks will be as follows: 

5 marks will be reserved for the preparation of solutions, neat methodical and systematic working of the candidates.

The remaining 8 marks will be distributed as follows:

% Error           Marks awarded

<1.0                 8

1.             7
2.             6
3.             5
4.             4
5.             3
6.             2
7.             1
8.             0

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 of chemistry.