Laboratory work in analytical chemistry

Example of laboratory work in analytical chemistry - studik.kiev.ua

Option 44

Suggest possible methods of quantitative determination of phenol. For one of them write the equation of reaction, specify the equivalence factor, indicate the method and method of titration, select the indicator, propose the formula for calculating the quantitative content.

The laboratory work is done in Ukrainian.

Option 44 Laboratory work in analytical chemistry

Both qualitative and quantitative analyses are presented in analytical chemistry lab work. In qualitative analysis, students study the reactions of cations and anions using the acid-base system of analysis, which is the safest in the classroom. In laboratory work, students are introduced to the qualitative reactions of cations and anions by analytical group, and then discover these cations when solving an experimental problem where there may be several cations and anions from different groups in the solution being analyzed. As we know, metal cations are trace elements and are present in food objects; they can be both beneficial and undesirable components of food.

In quantitative analysis, students learn gravimetric and volumetric methods of analysis. Laboratory work in quantitative analysis is both instructional and exploratory in nature. In such instructional works as “Weighing on analytical scales”, “Determination of hydrochloric acid concentration” students learn to work with scales, titration techniques, which they need when performing the following works: “Determination of the moisture content of food products: flour and vegetable oil”, “Determination of the acidity of food products”, “Determination of the temporary hardness of water”, “Examination of the total hardness of water”, which are already of a research nature.

When performing work on the physical and chemical methods of analysis, students learn and master how to use instruments to determine the concentration of a substance in solution.

Laboratory work related to instrumental research is performed on electrochemical, optical (refractometric and spectrophotometric), chromatographic methods of analysis, where the objects of study are food systems.

When working on physical and colloidal chemistry students learn to determine the rate of processes, the acidity of the environment in electrolyte solutions, obtain colloidal solutions, foams, emulsions, jelly, and study the properties of these dispersed systems.

The following is a list of laboratory work that has been done in the past:

  • Laboratory work No. 1 Getting acquainted with the equipment and utensils of qualitative analysis;
  • Laboratory work # 2. Reactions of group I cations;
  • Laboratory work #3. Reactions of group II cations;
  • Laboratory work № 4. The analysis of a mixture of group I and group II cations;
  • Laboratory work #5. Reactions of group III cations;
  • Laboratory work # 6. Analysis of a mixture of group III cations
  • Laboratory work #7. Analysis of a mixture of group II and group III cations
  • Laboratory work # 8. Reactions of group IV cations
  • Laboratory work # 9. Analysis of a mixture of group IV cations
  • Laboratory work #10. Analysis of a mixture of group III and group IV cations
  • Laboratory work #11. Analysis of a mixture of groups II, III, and IV cations
  • Laboratory work #12. Reactions of group V cations
  • Laboratory work #13. The analysis of a mixture of group V cations
  • Laboratory work # 14. Reactions of group VI cations
  • Laboratory work # 15. Analysis of a mixture of group V and group VI cations
  • Laboratory work #16. Reactions of anions
  • Laboratory work #17. Analysis of a mixture of anions
  • Laboratory work #18-19. Analysis of salts
  • Laboratory work #20. Weighing on an analytical balance
  • Laboratory work #21. Determination of the amount of crystallization water in crystalline hydrate
  • Laboratory work #22. Determination of the humidity of flour
  • Laboratory work #23. Determination of the humidity of vegetable oils
  • Laboratory work #24. The method of neutralization. Determining the concentration of hydrochloric acid
  • Laboratory work #25. Determination of the amount of NaOH alkali in the solution
  • Laboratory work #26. Determination of the temporary hardness of water by the neutralization method
  • Laboratory work #27. Determination of the acidity of foodstuffs by the neutralization method: sour vegetables, flour
  • Laboratory work #28. Determination of the acidity of foodstuffs by the neutralization method: milk and bread
  • Laboratory work #29. Permanganatometry. Determining the concentration of potassium permanganate solution
  • Laboratory work # 30. Determining the amount of iron (II) in a solution of Mohr’s salt
  • Laboratory work #31-32. Determination of the quantitative composition of the substance by iodometry.
  • Laboratory work #33. Methods of Precipitation and Complexation
  • Laboratory work # 34. Determination of the total hardness of water
  • Laboratory work #35. Complex determination of magnesium and calcium
  • Laboratory work #36. Complex determination of copper and nickel
  • Laboratory work #37. Determination of the quantitative composition of substances by quantitative analysis method
  • Laboratory work #38-39. Determination of the quantitative composition of a substance by photometric analysis
  • Laboratory work #40-41. Refractometric determination of the quantitative composition of matter
  • Laboratory work #42-43. Potentiometric determination of the quantitative composition of substance
  • Laboratory work # 44-45. Chromatographic determination of the quantitative composition of substance
  • Laboratory work #46-47. Determination of the rate of reaction depending on concentration and temperature
  • Laboratory work #48. The study of chemical equilibrium and the conditions of its displacement
  • Laboratory work #49. The determination of the pH of aqueous electrolyte solutions
  • Laboratory work #50-51. The creation of colloidal solutions
  • Laboratory work #52. The properties of colloidal solutions
  • Laboratory work #53. Coagulation of colloidal solutions
  • Laboratory work № 54. Preparation of emulsions and foams, identifying the role of the stabilizer
  • Laboratory work #55. Studying the phenomena of swelling and jelly formation for different food products

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