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Phenolphthalein is really a popular pH indicator that changes color with respect to the pH of a remedy. website is often found in acid-base titrations to determine the endpoint of the reaction.
In acidic solutions, phenolphthalein remains colorless, during basic solutions it turns pink or purple. The colour change occurs once the phenolphthalein molecule is deprotonated by hydroxide ions, causing it to improve from its acidic, colorless form to its basic, pink or purple form.
Phenolphthalein is a weak acid with a pKa of around 9. It is soluble in alcohol and ether, but only slightly soluble in water. It is used in titration experiments because of its color change properties, nonetheless it is important to notice that phenolphthalein is not suitable for use in strongly acidic or basic solutions, as its pH range is limited to around 8-10.
Homepage: https://udyamoldisgold.com/using-a-phenolphthalein-ph-indicator/
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