Titration

Some Important Questions
  1. How would you convert 500 cc of 2M H2SO4 into i. gm/lit ii. Normality (196,4)
  2. Which one has higher concentration and why?
    i. 80 gm/lit NaOH solution or 3M NaOH solution (3M)
    ii. 5.3 gm/lit Na2CO3 and N/10 Na2CO3 (same)
  3. A sample of Na2CO3 weighing 0.53 g is added to 101 ml of 0.1 N H2SO4. Will the resulting solution acidic, basic or neutral? (acidic)
  4. What is the normality of 20cc of 2M H3PO4? (6N)
  5. 0.012 gm of a divalent metal is completely dissolved in 40cc of N/10 HCl. The excess of acid required 15cc of N/5 NaOH for complete neutralization. Find the atomic weight of metal. (24)
  6. Calculate the volume of 1M NaOH required to neutralize 200 cc of 2M HCl. What mass of NaCl is produced from the neutralization reaction? (400cc,23.5g)
  7. 500 cc of 2N Na2CO3 are mixed with 400 cc of 3N H2SO4 and the volume was diluted upto 1 litre. Will the resulting solution acidic, basic or neutral? Also calculate the molarity of diluted solution. (acidic ,0.1M)
  8. 10 gm of NaOH was added to 200 cc of N/2(f=1.5) H2SO4. The volume was diluted upto 2 litres. Predict whether the dilute solution is acidic, basic or neutral and also calculate the resulting molarity of dilute solution. (basic, 0.05M)
  9. A solution of conc. HCl contain 38% by mass
    i. What is the molarity of this solution if the density of this solution is 1.19 gm/cc? (12.38N)
    ii. What volume of conc. HCl is required to neutralize one liter of 0.1 M NaOH? (8.007ml)
  10. How many ml of conc. HNO3 of specific gravity 1.41 containing 69% by mass are required to prepare 500 ml of 0.5 HNO3? (17.31 ml)
  11. A commercial sample of sulphuric acid has specific gravity 1.8. 10 ml of this acid was diluted upto 1 litre with water. 10 ml of diluted acid required 30 ml of N/10 NaOH for complete neutralization. Calculate the percentage purity of H2SO4 in the commercial sample. (81.66%)
  12. What volume of 95% sulphuric acid (density = 1.85 gm/cc) and what mass of water must be taken to prepare 100 cc of 15% solution of sulphuric acid (density = 1.1 gm/cc). (9.36cc, 90.64 gm)
  13. What volume of 12M NaOH and 2M NaOH should be mixed to get 2 litres of 9M NaOH solution. (1.4 L of 12M NaOH and 0.6 L of 2M NaOH)
  14. 0.8 gm of a divalent metal was dissolved in 100 cc of 1.28 N HCl and the solution was diluted to 200 cc. Then 50 cc of this solution required 54.6 cc of 0.22N NaOH for neutralization. Find the atomic weight of metal. (20)
  15. Calculate the resulting normality of a solution prepared by mixing 20ml of 0.8 M NaOH with 25 ml of 0.4M H2SO4. (0.088 N)
  16. 4 gm of a divalent metal was dissolved in 100 cc of 2M H2SO4 (f=1.01). The excess acid required 30 cc of 1N NaOH for complete neutralization. Find the atomic mass of metal. (21.62)
  17. Calculate the normality and molarity of 15% NaOH solution. (1.25M, 2.5N)
  18. How many moles of H2SO4 are required to neutralize 4 litres of 2N NaOH? (4 mol)
  19. What volume of water should be added to 500 ml of 2N (f=0.98) Na2CO3 to make it exactly N/10? (9300 ml)
  20. x cc of 5N HCl was diluted to one litre of normal solution. Calculate the value of x. (200 cc)
  21. What mass of Na2CO3 is required to make 50 cc of its seminormal solution? (1.325 gm)
  22. What volume of 5% NaOH is required to neutralize 2 litres of decinormal H2SO4? (0.16 lit)
  23. Convert a. 2.5M H3PO4 into N b. 4.9M H2SO4 into gm/lit.
  24. 4 gm of NaOH was added to 20 cc of 2N H2SO4 and the volume was diluted to 1 lit. Predict whether the dilute solution is acidic, basic or neutral and also calculate normality of the dilute solution in gm/lit. (basic, 2.4 gm/lit)
  25. What volumes of N/2 and N/10 HCl must be mixed to give 2 litres of N/5 HCl. (0.5 and 1.5 L)
  26. 3 gm of trivalent metal was completely dissolved with 750 ml of 1N HCl. The residual solution further required 1000 ml of N/2 NaOH for complete neutralization. Find the atomic mass of metal. (36)
  27. 0.715 gm of Na2CO3.xH2O required 20 ml of seminormal hydrochloric acid solution for complete reaction. Find the value of x. (2)
  28. 0.315 gm of a dibasic acid required 20 ml of seminormal HCl solution for complete reaction. Find the molecular mass of acid. (126 amu)
  29. What is the normality of 500 ml solution of sodium hydroxide containing 30 gm of NaOH? (1.5N)
  30. 7.35 gm of a dibasic acid was dissolved in water and diluted to 250 ml. 25 ml of this solution was neutralized by 15 ml of 1N NaOH solution. What is the equivalent and molecular weight of the acid? (49, 98)
  31. 5 gm of diacidic base is completely neutralized by 50 ml of 2N HCl. Find the molecular weight of base. (100)
  32. What volume of decinormal solution of HCl is required to neutralize 25 ml of NaOH solution containing 8g NaOH in one litre solution? (50ml)
  33. x gm of a metal (eq.wt. 12) was completely dissolved in 100 cc of N/2 HCl. The volume was then made upto 500 cc. 25 cc of this diluted acid required 17.5 cc N/10 NaOH for complete neutralization. Find the value of x. (0.18 gm)
  34. x gm of CaCO3 reacts completely with 20 ml of 1M HCl. Calculate the value of x. (1 gm)
  35. What volume of water must be added to 40 ml of 0.25N acid solution to make it exactly decinormal? (60 ml)
  36. 7.5 gm of dibasic acid dissolved in water and the solution made upto 250 cc. 25 cc of this acid requires 16.3 cc of 1N NaOH for completely neutralization. Calculate the molecular weight of the acid. (92.02)
  37. Calculate the molarity of 5% H2SO4 solution. (0.5M)
  38. 100 ml of 0.1 M HCl is mixed with 50 ml of 0.1 M KOH. Calculate the concentration of acid in terms of gm/lit in the resulting solution. (1.22 gm/lit)
  39. 20 ml of a sulphuric acid solution neutralizes 0.265 g of Na2CO3. Calculate the normality of acid solution. (0.25 N)
  40. x gm of magnesium (eq. wt. 12) reacts with 20 ml of 1N (f=0.95) acid. Calculate the weight of x. (0.228 gm)
  41. 25 cc of an alkali solution is mixed with 8 cc of 0.75 N acid solution for complete neutralization. It further requires 15 cc of 0.8N acid solution. Find the strength of given alkali solution.
  42. If 20 ml of 0.5 N NaOH is mixed with 30 ml of 0.3N HCl, is the resulting solution acidic or basic? Calculate the normality. (basic, 0.02N)
  43. What mass of 90% pure limestone is required to neutralize 2 litre decinormal solution of HCl? (11.11 gm)
  44. 2.84 ml of chamber acid is made upto a litre solution. 50 ml of this solution neutralize 38.2 ml of N/10 Na2CO3 solution. Find the percentage of sulphuric acid in the chamber acid if its specific gravity be 1.71. (77.08%)
  45. What volume of water is added to 25 ml of seminormal of sulphuric acid solution to make it
    exactly centinormal? (1225 ml)
  46. What is the molarity of water if it has specific gravity 1. (55.5 mol/lit)
  47. 0.84 gm of acid of molecular weight 150 was dissolved in water and made upto 100 ml. 25 ml of this solution required 28 ml of N/10 NaOH solution for complete neutralization. Calculate the basicity of the acid. (2)
  48. Find the molality of 20 gm NaOH dissolved in 100 gm solution? (6.25M)
  49. If 8.5 gm of ammonia is dissolved in 100 ml of solution. Find the molality if density of solution is 1.2 gm/lit. (4.48 M)
  50. Calculate the molality of a solution prepared from 29.1 g of toluene, C7H8 dissolved in 832 gm of benzene. (0.38 M)

References:
Mishra, AD, et al. Pioneer Chemistry. Dreamland Publication.
Mishra, AD et al. Pioneer Practical Chemistry. Dreamland Publication
Wagley, P. et al. Comprehensive Chemistry. Heritage Publisher & Distributors Pvt. Ltd.

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