知识贝壳
知识贝壳
所属栏目：英汉双解化学
An indicator that iseither a weak base or a weak acid andwhose dissociated and undissociated formsdiffer markedly in color. The color changemust occur within a narrow pH range. Ex-amples are methyl orange and phenol-phthalein.一种为弱酸或弱碱的指示剂。其解离和未解离状态的颜色有 ......（本文共 250 字 ） [阅读本文] >>