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Ionic Equilibrium 3 Mark Creative Question Paper With Answer Key

12th Standard

    Reg.No. :
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Chemistry

Time : 01:30:00 Hrs
Total Marks : 45

     3 Marks

    15 x 3 = 45
  1. A buffer solution containing 0.1 mole of ammonium hydroxide and 0.15 mole of ammonium chloride per litre of the solution. Calculate the pH of the buffer solution. Kb for ammonium hydroxide is 1.8 x 10-5.

  2. Based on Arrhenius concept, defame acid and bases and give an example for each.

  3. What do you mean by auto ionisation of water?

  4. Define buffer Index

  5. How will you calculate solubility product from molar solubility?

  6. For an aqueous solution of NH4CI, prove that [H+] = \(\sqrt { { K }_{ n }.C } \)

  7. What is Henderson equation?

  8. What do you mean by buffer action?

  9. Write the pH value of the following substances:
    A) Vinegar
    B) Black coffee
    C) Baking soda
    D) Soapy water

  10. What are the two types of buffer solution? Give example for each type.

  11. Derive the relation between pH and pOH.

  12. Prove that: pH + pOH =14 at 25oC.

  13. Explain Lewis theory of acids and bases.

  14. Write note on Lewis concepts of acids and bases.

  15. Derive the expression for pH of the hydrolysis of the salt of
    a) A strong base and a weak acid
    b) A strong acid and a weak base
    c) A weak acid and a weak base
    a) A strong base and a weak acid

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