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Sagot :
Chemical indicators are the chemical reagents that show the change in reaction by changing color. Chemical indicators must be chosen with a narrow pH range.
What are indicators?
Indicators are the solutions or the substances used for the qualitative and the quantitative measurement by a change in color because of the absence or the presence of the sample concentration.
The chemical indicators cannot detect the exact pH and should be used with a narrow range of pH.
Therefore, option C. the narrow range of pH is the disadvantage of chemical indicators.
Learn more about chemical indicators here:
https://brainly.com/question/15114406
Answer:
C (They must be selected for a narrow ph range.
Explanation:
Edg 2022
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