| 单词 | acid-base indicator |
| 释义 | acid-base indicator (extremely rare) n WORD FAMILY acid-base indicator n an indicator that changes color on going from acidic to basic solutions Hypo|Hyper phenolphthalein a laxative used in many preparations under various trade names; also used as an acid-base indicator in titrations involving weak acids and strong bases because it is brilliant red at high alkalinity and colorless below pH 8 congo reda red-brown azo dye especially as a chemical pH indicator (congo red is red in basic and blue in acidic solutions) methyl orangean azo dye used as an acid-base indicator; used for titrations involving weak bases litmus, litmus testa coloring material (obtained from lichens) that turns red in acid solutions and blue in alkaline solutions; used as a very rough acid-base indicator bromophenol blue, bromphenol blue, tetrabromo-phenolsulfonephthaleina dye used as an acid-base indicator bromothymol blue, bromthymol bluea dye used as an acid-base indicator indicator (chemistry) a substance that changes color to indicate the presence of some ion or substance; can be used to indicate the completion of a chemical reaction or (in medicine) to test for a particular reaction |
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