酸さん塩えん基き指し示じ薬やく

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Meanings

1

acid-base indicator

Technical term in chemistry; a substance that changes color depending on pH, used in titrations and pH testing.

酸さん塩えん基き指し示じ薬やくとしてフェノールフタレインを用もちいた。
Phenolphthalein was used as an acid-base indicator.

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