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1.小冬在制作酸碱指示剂的活动中记录如下,你认为不能做指示剂的是:2.下表为某指示剂在一定的pH范围内所显示的颜色向滴有少量指示剂的NaOH溶液中逐滴加入稀盐酸,出现的颜色变化是:
1. Xiao Dong recorded in the activity of making acid-base indicator as follows. What you think can’t be an indicator is: 2. The following table shows the color of an indicator displayed in a certain pH range. NaOH with a small amount of indicator. Dilute hydrochloric acid is added dropwise to the solution, and the color change that occurs is: