bromthymol blue
- noun
- /ˌbroʊmˈθaɪməl blu/
- Specialized
:
azul de bromotimol
- To determine the pH of the liquid, she added a drop of bromthymol blue to the test tube.
Examples
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Many science kits for students include bromthymol blue to demonstrate acid-base reactions.
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bromthymol blue turns yellow in acidic solutions and blue in basic solutions.
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The solution turned bromthymol blue when the pH increased.
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In the experiment, we used bromthymol blue to test acidity.
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bromthymol blue turns yellow in acidic solutions and blue in basic solutions.
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Many science kits for students include bromthymol blue to demonstrate acid-base reactions.
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To determine the pH of the liquid, she added a drop of bromthymol blue to the test tube.
Synonyms
A dye that changes color to show if a liquid is acid or base between pH 6.0 and 7.6
How Acidic
Surface Forms
Morphology
bromthymol + blue
This is a technical chemical name: knowing 'blue' only supplies a color cue and 'bromthymol' is a specialized, non-transparent chemical fragment (no ordinary-usage meaning provided). A B1 learner who knows the constituent words would not be able to infer the specific function 'acid–base indicator that changes color at certain pH values,' so the expression is not compositional for general learners.
Etymology
Bromthymol blue comes from the parts brom, from the element 'bromine', and thymol, a substance first found in the herb thyme, plus the word 'blue' for the dye. It is a blue dye that turns yellow in 'acid' and blue in 'base', so the name helps you remember it is a color-changing indicator.