甲基橙在通常的化学实验中,吾人常须鉴别一种溶液为酸性还是碱性。鉴别的方法通常需用一种指示剂Indicator,由其颜色的变化,而得知一种溶液为酸性或碱性,是很简便的。例如最普通的指示剂是石蕋质,或称里底莫司Litmus,由石蕋质制成之纸条有蓝色和红色二种。将蓝色的石蕋纸浸入溶液中,倘蓝色消退而变为红色的,表明这溶液带酸性;如果红色的石蕋纸遇到溶液后即变为蓝 Methyl Orange In common chemical experiments, we often have to identify whether a solution is acidic or basic. Identification method is usually required to use an indicator Indicator, from the color change, and that a solution is acidic or alkaline, is very simple. For example, the most common indicator is stone, or the Litmus, and the paper made of stone is blue and red. Immersion of the blue scallop paper in the solution turns red if the blue subsides, indicating that the solution is acidic; if the red scallop paper becomes blue upon encountering a solution