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∙ 11y ago
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What is the chemical formula of thymolphthalein?
C28H30O4
How do you pronounce thymolphthalein?
Thy-mol-phtha-lin
What are some indicators of acids?
Methyl Red, methyl orange, bromophenol blue, phenolphthalein, thymolphthalein, bromocresol green, bromothymol blue are all used as acid base indicators.
What is vanishing color?
Vanishing color refers to a phenomenon where an object's color appears to fade or blend in with its surroundings, making it difficult to distinguish. This effect occurs due to factors like lighting conditions, background colors, and color perception by the human eye.
How do you use phenophthalein to test for acids and bases?
Any titration is done to find the "equivalence point" - where the amount of titrant (strong base in your question) is equal to the amount of unknown (weak acid in your question). When the two are equal, the base has converted all the weak acid into it's conjugate base. An indicator should change color over the pH range that includes the equivalence point. In your question, when using a weak acid, what's left at the equivalence point is a strong conjugate base. The solution will have a slightly basic pH. Phenolphthalein has a colorless to pink transition over the range of pH 8-9.6, which is slightly basic. So it changes color across the equivalence point. So it makes a good indicator for the scenario you asked about. Thymol blue (color change slightly lower pH, weaker base, stronger acid) or Thymolphthalein (color change slightly higher pH, stronger base, weaker acid) may also be good choices.
What can we use as an indicator for acids and bases?
One common indicator for acids and bases is litmus paper, which turns red in the presence of an acid and blue in the presence of a base. Alternatively, pH paper can be used to measure the pH level of a substance, with a pH below 7 indicating acidity and a pH above 7 indicating basicity.
