Phenolphthalein: Changes to one colour, Pink in alkali, Colourless in acids and water, Methyl Orange: Changes to two colours, Red in acids, Yellow in water and alkali, Bromothymol Blue: Changes to three colours, Yellow in acids, Green in water, Blue in alkali, Universal: Changes to many colours, Red, orange, yellow in acids, Green for neutral, Blue and purple in alkali,

Indicator Group Sort

打印
嵌入

排行榜

视觉风格

选项

切换模板

恢复自动保存：？