GK
CHEMISTRY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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In which 0.01M solution is phenolphthalein pink?))
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CH3COOH (aq)
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H2CO3 (aq)
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HCl (aq)
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KOH (aq)
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Explanation:
Detailed explanation-1: -Explanation: Phenolphthalein is an indicator. When phenolphthalein is added to acid, the solution become colorless. when phenolphthalein is added to base, the solution become pink.
Detailed explanation-2: -Phenolphthalein solution turns pink in the presence of a base. This is because the hydroxide ions react with the acidic group present and lead to the formation of ions. These ions impart color to the solution. This is how phenolphthalein solution acts as an acid-base indicator in titrations.
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