Questions:
1. What is law of mass action? Derive Henderson-Hasselbalch equation? 2+3
2. Why is it important to make solution of secondary standard substance just before use? If we add trace amount of acid or base in an acidic buffer system, what will happen? Explain. 1+4
3. How equivalence point is detected in back titration? How does an indicator change its color? How will you select a suitable indicator from a titration curve of strong base and weak acid? 1+2+2
4. Why non-aqueous acid base titration is used? Which principle does works behind it? 1+4
5. Which solvents are used in non-aqueous acid base titration? How water act as an amphiprotic solvent?
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