Strictly speaking, the ion concentration should be replaced by activity (in fact, the PH value measured by the acidity meter reflects the activity value in the solution). In the dilute solution of weak acid, if there is no other strong electrolyte, that is, the ionic strength in the solution is very small and the activity coefficient is close to 1, the activity can be replaced by concentration.
Precautions:
Acetic acid is a simple carboxylic acid, which consists of a methyl group and a carboxyl group. It is an important chemical reagent. In the chemical industry, it is used to make polyethylene terephthalate, which is the main part of beverage bottles.
Acetic acid is also used to make cellulose acetate for films and polyvinyl acetate for wood adhesives, as well as many synthetic fibers and fabrics. In the family, dilute acetic acid solution is often used as a scale remover. In the food industry, acetic acid is an acidity regulator specified in the food additive list E260.
The world's annual demand for acetic acid is about 6.5 million tons. About 6.5438+0.5 million tons are recycled, and the remaining 5 million tons are made directly from petrochemical raw materials or biological fermentation.
Refer to the above content: Baidu Encyclopedia-acetic acid