Question:
what are the colour changes of phenolphthalein when acted upon by acid and bases
Answer:
Phenolphthalein undergoes color changes in a variety of pH range.
In mild acidic solutions (pH = 3-5), it exists in orange color.
In strongly acidic conditions (pH of 1-2), it becomes colorless.
In mild basic conditions, (pH 8-12), it has a fuschin pikn color.
In strongly basic conditions, pH > 13, it again turns colorless.
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