Replace the acidity of orange indicator of instructions to the end.
基橙指示剂取代酸度计来指示终点。
2
Indicator A substance used to test for acidity or alkalinity of a solution by a color change.
是一种用颜色的变化来表示溶液中酸碱程度的物质。
3
Such problems are discussed that low-acidity emerges in the quality analysis of hydrochloric acid and the chromogenic reaction of acidic-analysis indicator doesn′t work.