What are the requirements of titration analysis for chemical reaction?

1, the reaction must be completed quantitatively according to the equation, usually above 99.9%, which is the basis of quantitative calculation.

2. The reaction can be completed quickly (sometimes heating or catalyst can be used to accelerate the reaction).

3, * * * * substance does not interfere with the main reaction, or use appropriate methods to eliminate its interference.

4. There is a relatively simple method to determine the metering point (indicating the titration end point).

Titration analysis is a quantitative analysis method based on titration reaction. If the titration reaction formula of substance A and titrant B is aA+bB = dD+eE. It means that A and B react quantitatively according to the molar ratio of A: B ... This is the quantitative relationship of titration reaction and the basis of quantitative judgment of titration analysis.

Extended data:

Other related methods of titration analysis: acid-base titration

Application significance:

Acid-base titration is of great significance in the fields of industry, agricultural production, medicine and health. Ternary acid and dibasic acid are important chemical raw materials, and they are all analyzed in this way. When determining the saponification value of grease for soap making, the ethanol solution of potassium hydroxide is used to react with the grease first, and then the excess potassium hydroxide is dripped back with hydrochloric acid, so as to calculate how many milligrams of potassium hydroxide is consumed by 1 g grease, which is the basis for the amount of alkali needed for soap making.

Another example is when the acid value of oil is determined, the free acid in oil is titrated with potassium hydroxide solution, and the data of how many milligrams of potassium hydroxide is consumed per gram of oil can be obtained. The acid value indicates the freshness of the oil. The content of protein in cereals can be determined by Kjeldahl method. Many drugs are very weak organic bases and can be titrated with perchloric acid in glacial acetic acid medium. The determination of HCO in blood can provide reference for clinical diagnosis.

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