Lactic acid and sodium reaction is a common chemical reaction and one of the important metabolic processes in organisms. Lactic acid is an organic acid with the chemical formula of C3H6O3, which is common in fermented foods, such as yogurt, pickled Chinese cabbage, etc. Sodium is a metallic element with the chemical symbol Na, commonly found in salts.
The chemical equation for the reaction between lactic acid and sodium is:
C3H6O3+Na → C3H5O3Na+H2
In this reaction, lactic acid and sodium undergo displacement reaction, producing sodium lactate and hydrogen gas. Sodium lactate is a salt compound with the chemical formula C3H5O3Na, commonly found in food additives such as seasonings and beverages.
The experimental process of the reaction between lactic acid and sodium is as follows:
1. Take a certain amount of lactic acid solution and add a small amount of sodium tablets.
2. Observing the reaction process, it can be seen that the sodium sheet gradually disappears while releasing hydrogen gas.
After the reaction is complete, the concentration of sodium lactate can be determined by titration.

The application of the reaction between lactic acid and sodium is very extensive, mainly including the following aspects:
1. In the food industry, sodium lactate is commonly used as a seasoning, acidifier, preservative, etc.
In the pharmaceutical industry, sodium lactate is commonly used as a sustained-release agent, stabilizer, etc. for drugs.
In biochemistry, sodium lactate is one of the products of lactate dehydrogenase reaction and participates in metabolic processes in organisms.
In short, the reaction between lactic acid and sodium is an important chemical reaction with wide application value. By conducting in-depth research on this reaction, we can better understand the metabolic processes within living organisms and provide strong support for the development of the food and pharmaceutical industries.