North Maharashtra University 2009 B.Sc Chemistry Acid & Base Titration - Question Paper

S.Y.B.Sc.-Paper-CH-212
First Term Q.B. (Analytical Chemistry)

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ques. of 2 marks every.
1) describe the term acid base Indicator. provide example
2) describe the term End point.
3) describe the term Equivalence point in titration.
4) describe neutralisation point.
5) discuss the transition range of indicator in acid base titration.
6) Draw the titration curve for Strong acid Vs Strong base titration.
7) Draw the titration curve for Strong acid Vs Weak base titration.
8) Draw the titration curve for Weak acid Vs Strong base titration.
9) describe the precipitation titration.
10) describe the Argentimetric titration.
11) Draw the titration curve for precipitation titration.
12) Write Henderson-Hasselbatch formula for acid base indicator.
13) Which indicator used in Strong acid Vs Strong base titration.
14) Which indicator used in Strong acid Vs Weak base titration.
15) Which indicator used in Weak acid Vs Strong base titration.
16) provide the formula for pH computation at equivalence point in titration of
Weak acid Vs Strong base.
17) provide the formula for pH computation at equivalence point in titration of
Strong acid Vs Weak base.


ques. of 3 marks every.

1) discuss the transition range of indicator in acid base titration.
2) discuss the option of indicator in strong acid and strong base titration.
3) discuss the option of indicator in weak acid and strong base titration.
4) discuss the option of indicator in strong acid and weak base titration.
5) discuss mechanism of indicator used in Mohr’s method.
6) discuss mechanism of indicator in Volhard’s method.
7) provide preparation of 0.1 N Standard solution of Silver nitrate.
8) provide limitation of Mohr’s method.
9) discuss –precipitation of Ag2CrO4 takes place only after the precipitation of
AgCl.
10) compute the pH at equivalence point for titration of NH4OH and HCl.
(Given Ka=1.75 X 10-5)
11) compute the initial pH in the titration of 0.1 N Acetic acid Vs NaOH
solutions.
(Given Ka=1.75 X 10-5)
12) compute the initial pH in the titration of 0.1 N NH4OH Vs HCl solutions.
(Given Ka=1.75 X 10-5)

ques. of 4 marks every.

1) Derive Henderson-Hasselbatch formula for acid-base indicators.
2) discuss in brief the nature of titration curve of strong acid with strong base.
3) discuss in brief the nature of titration curve of weak acid with strong base.
4) discuss in brief the nature of titration curve of strong acid with weak base.
5) Draw the titration curve of strong acid with strong base. explain option of
suitable indicator for this titration.
6) define Mohr’s method for standardisation of Ag NO3 solution.
7) define the Fajan’s method for the estimation of Chloride.
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8) Show by computation that the theoretical concentration of potassium
chromate indicator in Mohr’s method is 0.014 M when the concentration of
sodium chloride and silver nitrate is 0.1 M every.
Solubility product of AgCl=1.2 x10-10
Solubility product of Ag2Cro4=1.7 x10-12
9) define the various methods of minimising the titration fault in Volhard’s
method?
10) provide the theory of adsorption indicators.
11) elaborate the conditions for good outcome of adsorption indicators?
12) The reaction ranging from the thiocyanate solution and AgCl precipitate is
prevented in Volhard’s method.-Explain.
ques. of 6 marks every.
1) Derive the Henderson-Hasselbatch formula for indicator and discuss
transition range of an indicator.
2) discuss the nature of titration curve of strong acid with strong base?
Which indicator can be used for this titration? Why?
3) discuss the nature of titration curve of strong acid with weak base, which
indicators can be used for this titration? Justify?
4) discuss the nature of titration curve of a weak acid with strong base.
Name the indicator which can be used and justify its selection.
5) define preparation and standardisation of 0.1M AgNO3 solution by
Mhor’s method.
6) discuss the titration curve for precipitation titration.
7) discuss principle involved in Fajan’s method? explain the estimation of
chloride by Fajan’s method.

Earning:   Approval pending.