百科释义
报错An acid (often represented by the generic formula HA [H<sup>+</sup>A<sup>−</sup>]) is traditionally considered any chemical compound that, when dissolved in water, gives a solution with a hydrogen ion activity greater than in pure water, i.e. a pH less than 7.0. That approxim... 查看百科
注：百科释义来自于百度百科，由网友自行编辑。