SorenR386312 SorenR386312
  • 03-11-2022
  • Chemistry
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The universal indicator changes color throughout the pH range. How is this indicator produced?

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NylahZ7457 NylahZ7457
  • 03-11-2022

Answer and Explanation:

The color change of a pH indicator is caused due to the dissociation of protons H+. The most common indicators are: phenolphthalein, methyl red, and bromothymol blue, which are used to indicate pH ranges of about 8 to 10, 4.5 to 6, and 6 to 7.5, respectively. For each indicator, phenolphthalein goes from colorless to pink, methyl red goes from red to yellow, and bromothymol blue goes from yellow to blue.

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