Specify the molecular mass of air

Unit of the mass of the substance A

Unit of a density of a solution A

Unit of the factor of equivalence

Unit of a number of equivalence of the substance A

Unit of the molar mass of an equivalent of the substance A

Unit of the molar mass of the substance A

Unit of an equivalent of substance A

Unit of the number of equivalents of substance A

Unit of the number of substance A

Unit of a mass fraction

Unit of normal concentration

Unit of molar concentration

Unit of a titer

Chemistry 5B072600, 5B073300 (300 tests)

Финал.

7. Музыкальная активизация "Обожаем новый год!"

Ведущий поет куплет, гости припев.

8. Дополнительно:

- Новогодняя вэлком-зона

- Двигательная активизация

- Тест - предсказание "2017"

1. The elementary object is …

1. Atom, molecule, ion, radical, equivalent and other elementary particles

2. Specify the Avogadro number (N_A)

А) 6,02·10²³

3. Mathematical expression of the law of equivalents for reaction аА + вВ → сС is:

A. n (1/Z_AA) = n (1/Z_BB)

4. Finish the definition: molar concentration of substance A is …

1. number of substance A per 1 liter of solution

5. Finish the definition: normal concentration of substance A is …

1. number of equivalents of substance A per 1 liter of solution

6. Finish the definition: molar concentration of equivalents of substance А is …

1. number of equivalents of substance A per 1 liter of solution

7. Finish the definition: mass concentration of substance A is …

1. mass of substance A per unit of volume of solution of substance A

8. Finish the definition: the titer of substance A is …

1. special case of mass concentration (unit is g/ml)

9. Finish the definition: the mass fraction of substance A is …

1. mass of substance A to the total mass

10. Finish the definition: the density of solution A is …

1. mass of solution A to unit of volume of solution A

1. g/ml

1. mol/l

1. mol/l

A. %

1. mol

A. mol

1. there is no unit

1. g/mol

1. g/mol

1. there is no unit

1. there is no unit

1. g/ml

1. g

А) 29 g/mole

25. Specify the molar volume of a gas at normal condition

А) 22,4

26. Define the number of equivalence of the phosphoric acid for the following reaction: H₃PO₄+NaOH=NaH₂PO₄+H₂O

1. 1

27. Determine the equivalent of soda for the reaction: Na₂CO₃ + 2 HCI = 2 NaCI + CO₂ + H₂O

1. 1/2 Na₂CO₃

28. Determine the equivalent of soda for the reaction: Na₂CO₃ + HCI = NaHCO₃ + NaCI

1. Na₂CO₃

29. Determine the number of equivalence of soda for the reaction: Na₂CO₃ + 2 HCI = 2 NaCI + CO₂ + H₂O

1. 2

30. Determine the factor of equivalence of soda for the reaction: Na₂CO₃ + 2 HCI = 2 NaCI + CO₂ + H₂O

1. 1/2

31. Determine the number of equivalence of soda for the reaction: Na₂CO₃ + HCI = NaHCO₃ + NaCI

1. 1

32. Determine the factor of equivalence of soda for the reaction: Na₂CO₃ + HCI = NaHCO₃ + NaCI

A. 1

33. Determine the equivalent of permanganate ion for the reaction: MnO₄^-+ 8 H ⁺ + 5 e = Mn^{2 +} + 4 H₂O

1. 1/5 MnO₄^-

34. Determine the equivalent of iron for the reaction: 5 Fe^{2 +} + MnO₄^-+ 8 H ⁺ = 5 Fe^{3 +} + Mn^{2 +} + 4 H₂O

1. Fe

35. Determine the equivalent of dichromate ion for the reaction: Cr₂O₇^2-+ 14 H ⁺ + 6 e = 2 Cr^{3 +} + 7 H₂O

1. 1/6 Cr₂O₇^2-

36. Determine the equivalent of calcium phosphate for the reaction: 3 Ca^{2 +} + 2 PO₄^3- = Ca₃ (PO₄) ₂

1. 1/6 Ca₃ (PO₄) ₂

37. Determine the number of equivalence of permanganate ion for the reaction: MnO₄ ^-+ 8 H ⁺ + 5 e = Mn^{2 +} + 4 H₂O

1. 5

38. Determine the factor of equivalence of permanganate ion for the reaction: MnO₄^-+ 8 H ⁺ + 5 e = Mn^{2 +} + 4 H₂O

1. 1/5

39. Determine the number of equivalence of iron for the reaction: 5 Fe^{2 +} + MnO₄^-+ 8 H ⁺ = 5 Fe^{3 +} + Mn^{2 +} + 4 H₂O

1. 1

40. Determine the factor of equivalence of iron for the reaction: 5 Fe^{2 +} + MnO₄^-+ 8 H ⁺ = 5 Fe^{3 +} + Mn^{2 +} + 4 H₂O

1. 1

41. Determine the number of equivalence of dichromate ion for the reaction: Cr₂O₇^2-+ 14 H ⁺ + 6 e = 2 Cr^{3 +} + 7 H₂O

A. 6

42. Determine the factor of equivalence of dichromate ion for the reaction: Cr₂O₇^2- + 14 H ⁺ + 6 e = 2 Cr^{3 +} + 7 H₂O

A. 1/6

43. Determine the number of equivalence of calcium phosphate for the reaction: 3 Ca^{2 +} + 2 PO₄^3- = Ca₃ (PO₄) ₂

1. 6

44. Determine the factor of equivalence of calcium phosphate for the reaction: 3 Ca^{2 +} + 2 PO₄^3- = Ca₃ (PO₄) ₂

1. 1/6

45. Calculate the normal concentration of 12 % H₂SO₄ (density 1.080).

1. 2.6

46. Calculate the mass fraction (%) of the 6.5 M phosphoric acid (density 1.32).

A. 48.3

47. Calculate the mass fraction (%) of the sulfuric acid in its 10 n. solution (density 1.29).

1. 38

48. Calculate the mass fraction (%) of HCl in its 7.98 M solution (density 1.13).

1. 26

49. Calculate the mass fraction (%) of HNO₃ in its 4.85 M solution (density 1.16).

1. 26

50. Calculate the mass fraction (%) of КОН in its 8.55 M solution (density 1.35).

1. 35.5

51. Calculate the mass fraction (%) of NaOH in its 0.7 M solution (density 1.03).

1. 2.7

52. Calculate the mass fraction (%) of Na₂CO₃ in its 3.07 n. solution (density 1.15).

1. 14

53. Calculate the mass fraction (%) of NH₃ in its 14.8 M solution (density of 0.9g/ml).

1. 28

54. Calculate the normal concentration of the sulfuric acid if its titer is equal 0.02446 g/ml.

1. 0.4988

55. Calculate the molar concentration of sodium hydroxide if its titer is equal 0.004020 g/ml.

1. 0.1005

56. Calculate the titer of the sulfuric acid, if its normal concentration is 0.1008 mol/l.

1. 0.004943

57. Calculate the titer of sodium hydroxide, if its molar concentration is 0.09981 mol/l.

1. 0.003992

58. Calculate the molar concentration of the sulfuric acid if its titer is equal 0.004852 g/ml.

1. 0.04947

59. Calculate the normal concentration of the sulfuric acid if its titer is equal 0.004852 g/ml

1. 0.09895

60. The titer of the hydrochloric acid is equal to 0.003592 g/ml, determine the molar concentration of the solution.

1. 0.09841

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