Answer :
We employ several indicators to determine the pH of a solution because indicators typically change color across small pH ranges.
What exactly are signs?
A chemical that changes color in response to the pH of the solution in which it is utilized is called an indicator. The material is being examined in an acid-base titration with a specific target pH in mind.
Can one concept have more than one indicator?
Multiple signs of a same notion cannot exist. More crucial than accurate measurement is precise measurement. When in doubt about how precise a measurement should be, it is preferable to be more generic to make data gathering easier.
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