Is phenolphthalein a strong or weak acid?
Phenolphthalein is a colourless, weak acid which dissociates in water forming pink anions.
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Is phenolphthalein a strong or weak acid?
Phenolphthalein is a colourless, weak acid which dissociates in water forming pink anions.
What color is phenolphthalein acidic?
colorless
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.
How do acids react with phenolphthalein?
Phenolphthalein is an indicator — a chemical which changes colour depending on whether it meets an acid or a base. It turns purple if it meets something basic, such as ammonia; it stays colourless if it meets an acid like vinegar or a neutral substance like water.
Why is phenolphthalein a weak acid?
It belongs to the phthalein family which is mostly used as an acid-base indicator. Because it indicates the pH of the solution, it is colourless below 8.5 pH and is able to attain a pink to deep red colour above 9.0 pH. Phenolphthalein is a weak acid and it dissociates in water to give pink anions.
Why is phenolphthalein used for weak acid and strong base?
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.
What color is phenolphthalein at pH 3?
Phenolphthalein pH Range and Colors Phenolphthalein is colorless under acidic, neutral, and slightly basic conditions. It’s pink between pH values of 8.3 and 10.0 and then becomes colorless again at pH values greater than 10. At extremely low pH, like concentrated sulfuric acid, the color turns orange-red.
Which colour is given by phenolphthalein in acidic and neutral medium?
Phenolphthalein turns colourless in acidic solution and pink in basic medium.
Why do we add phenolphthalein to the acid and not the base?
What is the reaction of base with phenolphthalein?
when phenolphthalein reaction with acids ( colourless). it reacts with bases it turns pink.
Is phenolphthalein acidic or basic?
phenolphthalein, (C20H14O4), an organic compound of the phthalein family that is widely employed as an acid-base indicator. As an indicator of a solution’s pH, phenolphthalein is colourless below pH 8.5 and attains a pink to deep red hue above pH 9.0.
Why phenolphthalein is used as an indicator?
In acid base titration phenolphthalein is used as indicator. As the concentration of OH− ions increases a little, solution turns pink from colourless giving its end point.
Why is phenolphthalein used in weak acid?
