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。

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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。

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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.

对盐酸质量分析中出现的酸度低、酸度分析指示剂不显色等问题进行了讨论。

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