12th Chemistry Important Questions Unit 8 Ionic Equilibrium

TN 12th Chemistry Important Questions Unit 8 Ionic Equilibrium. 12th Chemistry Important Questions Chapter 8 Transition And Inner Transition Elements +2 Chemistry Important 2 Marks, 12th Chemistry Important 3 Marks, Chemistry Important 5 Marks Questions Based on reduced Syllabus 2021-2022. 12th Free Online Test (MCQs). HSC 12th Chemistry Revision Test Important Questions. 12th Tamil Full Guide.

12th Chemistry Important Questions Chapter 8 Ionic Equilibrium

12th Chemistry All Units Important Questions

8. Ionic Equilibrium

• 1. What are Lewis acids and bases? Give two examples for each.
• 2. Discuss the Lowry – Bronsted concept of acids and bases.
• 3. Indentify the conjugate acid base pair for the following reaction in
  i, HS^–_(aq) + HF ⇌ F^–_(aq) + H2S_(aq) ii, HPO₄^2- + SO₃^2-⇌ PO₄^3- + HSO₄^–
  iii, NH₄⁺ + CO₃^2- ⇌ NH₃ + HCO₃^–
• 4. Account for the acidic nature of HClO₄ in terms of Bronsted – Lowry theory, identify its conjugate base.
• 5. When aqueous ammonia is added to CuSO₄ solution, the solution turns deep blue due to the formation of tetramminecopper (II) complex, [Cu(H₂O)₄]²⁺(aq) + 4NH_3(aq)⇌ [Cu(NH₃)₄]²⁺_(aq) + 4H₂O, among H₂O
  and NH₃ Which is stronger Lewis base.
• 6. The concentration of hydroxide ion in a water sample is found to be 2.5 ×10^-6M. Identify the nature of the solution.
• 7. A lab assistant prepared a solution by adding a calculated quantity of HCl gas at 25^oC to get a solution with [H₃O+]= 4× 10^-5 M. Is the solution neutral (or) acidic (or) basic.
• 8. Calculate the pH of 0.04 M HNO₃Solution.
• 9. Define solubility product
• 10. Define ionic product of water. Give its value at room temperature.
• 11. Explain common ion effect with an example
• 12. Derive an expression for Ostwald‟s dilution law
• 13. Define pH
• 14. Calculate the pH of 1.5×10^-3M solution of Ba(OH)₂
• 15. 50ml of 0.05M HNO₃ is added to 50ml of 0.025M KOH . Calculate the pH of the resultant solution.
• 16. The Ka value for HCN is 10^-9 . What is the pH of 0.4M HCN solution?
• 17. Solubility product of Ag₂CrO₄ is 1×10^-12 . What is the solubility of Ag₂CrO₄ in 0.01M AgNO₃ solution?
• 18. Write the expression for the solubility product of Ca₃(PO₄)₂
• 19. A saturated solution, prepared by dissolving CaF_2(s)in water, has [Ca²⁺]=3.3× 10^-4 M What is the Ksp of CaF₂?. Calculate the pH of the resultant solution.
• 20. Ksp of AgCl is 1.8 ×10⁻¹⁰ . Calculate molar solubility in 1 MAgNO³
• 21. A particular saturated solution of silver chromate Ag₂CrO₄ has [Ag⁺]=5 ×10^-5and
  22. [CrO ^2-] =4.4 × 10 M What is the value of K for Ag CrO₄ ?
• 23. Write the expression for the solubility product of Hg₂Cl₂.
• 24. Ksp of Ag₂CrO₄ is 1.1 × 10^-12 . what is solubility of Ag₂CrO₄ in 0.1M K₂CrO₄.
• 25. Will a precipitate be formed when 0.150 L of 0.1M Pb(NO₃)₂ and 0.100L of 0.2 M NaCl are mixed? Ksp (PbCl₂)=1.2×10^-5
• 26. Ksp of Al(OH)₃ is 1×10^-15M. At what pH does 1.0 ×10^-3M Al³⁺ precipitate on the addition of buffer of NH₄Cl and NH₄OH solution?
• 27. Discuss the Arrhenius concept of acids and bases
• 28. What are the limitations of Arrhenius concept?
• 29. What are conjugate acid – base pairs? give one example?
• 30. Differenciate Lewis acids and Lewis bases?
• 31. How will you measure the Strength of Acids and Bases?
• 32. Derive the ionisation constant or dissociation constant of the acid.
• 33. Define the degree of ionisation or dissociation
• 34. The dissociation of a CH₃COOH is suppressed in the presence of CH₃COONa. Give the reason.
• 35. What are Buffer solution?
• 36. Mention types of Buffer solution.
• 37. Explain the Buffer action of the solution.
• 38. Derive Henderson – Hasselbalch equation
• 39. Derive the relationship between pH and pOH
• 40. How will you determined the solubility product from molar solubility?
• 41. Define Ostwald‟s dilution law
• 42. How will you determine strength of Acids and Bases?
• 43. Calculate the pH of 10^-7M HCl
• 44. What are conjugate acid–base pairs? Give example.
• 45. 0.1M Solution of HF is weak acid. But 5M solution of HF is a stronger acid. Why?
• 46. The Ka value of HCN is 10^-9. What is the pH of 0.4M HCN solution?.
• 47. Write pH value of the following
  a) Vinegar b) Baking soda c) Black coffee d) Soapy water

12th Chemistry All Units Important Questions