Tutorial-8

TUTE SHEET-8
ANALYTICAL METHODS


1. What is Thermogravimetric analysis? Describe briefly.
2. What do you understand by a thermogram and a differential thermogram?
3. What do you understand by hypsochromic shift and bathochromic shift?
4. What do you understand by in UV spectroscopy
5. On what factors does the conductance of an electrolytic solution depend?
6. What is differential scanning calorimetry? Discuss the principal involved and the instrumentation used. How is the technique helpful in determining the enthalpies of transitions?
7. Discuss the principle involved in flame –photometry. Give a brief account of its applications.
8. What is flame-photometry? Describe the working of a common flame-photometer and give a brief account of the important applications of the technique.
9. Give a brief account of the vibrational- rotational spectra of diatomic molecules.
10. What are conductometric titrations? Give an account of the principle and the method of the technique.
11. In conductometric titrations, more concentrated solution is added from the burette, why? Explain the conductometric titration of a strong acid against a strong base.
12. Explain the following conductometric titrations:

i) titration of a weak acid against a strong base
ii) Titration of a strong acid against a weak base
iii) Titration of AgNO3 against KCl.
13. Explain the basic principle involved in the thermogravimetric analysis. What is its use in the structural determination of compounds?
14. What is meant by thermal analysis? Explain the functioning of DTA using block diagram.