食醋通常是一种含有水和乙酸的溶液,因此不是纯净物。纯净物是指化学上纯度非常高的物质,通常由单一种类的分子或原子组成。食醋中除了乙酸外,可能还含有其他的物质,比如水和微量的杂质。

Feeding vinegar is a kind of solution that contains water and second acid normally, because this is not pure content. Pure content is the material that shows the purity on chemistry is very tall, comprise by the element of onefold sort or atom normally. In feeding vinegar besides second acid, the likelihood still contains other material, for instance water is mixed the impurity of minim.