Question

9.6 Is it possible to find the nature of an unknown solution using phenolphthalein as an indicator​

Answer 1

Answer:

Phenolphthalein is often used as an indicator in acid–base titrations. For this application, it turns colorless in acidic solutions and pink in basic solutions.Phenolphthalein is a Synthetic Acid-Base indicators. Which reacts with acid to be colourless and when it reacts with Base it then be of Pink color. Hence, the given unknown solution A may be BASIC in nature which results to change the color of Phenolphthalein to pink. While the solution B may be of acidic nature.A strong acid- strong base titration is performed using a phenolphthalein indicator. Phenolphtalein is chosen because it changes color in a pH range between 8.3 – 10. It will appear pink in basic solutions and clear in acidic solutions. ... Neutralization is the basis of titration.

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Answer 2

ANSWER :-

Penolpthalein turn pink only in a basic solution . Stays colourless in acid and natural solution in case the unknown solution stays colour less than adding Phenolpthalein if it turns pink we can tell us unknown solution in basic in nature