0
we can prepare phenol phtahaline in lap from;
1-salicylic acid by:
part of salysilic acid pw+phthalic anhydride+c.h2so4(heat&fusion) ـ<ــــــــــــــــــــــــــthen cool&pour in 10%NaOH.............>PINK COLOR...
or:
2-by phenol... by the same method...
3-or by resorcinol by the same method...
Wiki User
∙ 11y ago
Add your answer:
Earn +20 pts
Which is more polar bromophenol blue or phenolphthalein?
Phenolphthalein is more polar than bromophenol blue due to its structure and functional groups. Phenolphthalein contains more oxygen atoms that can participate in hydrogen bonding, making it a more polar compound compared to bromophenol blue.
What is phenolphthalein made of?
Phenolphthalein is a synthetic organic compound made from phenol and phthalic anhydride. It is commonly used as a pH indicator in chemistry experiments due to its color-changing properties.
Is phenolphthalein a compound?
Yes, phenolphthalein is a compound with the molecular formula C20H14O4.
What is the color of lime water when phenolphthalein is added into lime water?
The color is pink with phenolphthalein.
What happens when water is added to phenolphthalein?
When water is added to phenolphthalein, the color remains the same, which is colorless. Phenolphthalein is typically used as an indicator in titrations with strong acid and strong base where the color change is triggered by changes in pH, not by the addition of water.
When phenolphthalein is added to ammonium hydroxide is the color of the final solution is pink?
Phenolphthalein is a colorless indicator in acidic solutions but turns pink in basic solutions. If phenolphthalein turns pink when added to ammonium hydroxide, which is a basic solution, it indicates the presence of a pH above 7.
Why phenolphthalein get colour on basic medium?
Phenolphthalein is colorless in acidic solutions but turns pink or purple in basic solutions because the hydroxide ions in the basic medium react with phenolphthalein to form a pink-colored compound. This color change is due to a shift in the chemical structure of phenolphthalein when exposed to a basic environment.
Phenolphthalein goes what colour in a base?
Phenolphthalein turns pink in a base and turns colourless in a base
What chemical reaction between the phenolphthalein and NaOH?
Phenolphthalein reacts with NaOH in a neutralization reaction, where the acidic H+ ions in phenolphthalein are replaced by the basic OH- ions from NaOH. This reaction leads to the formation of a pink color indicating the basic nature of the solution.
Phenolphthalein change color when mixed with hydrochloric acid?
Phenolphthalein is a pH indicator that changes color in response to a change in pH. When mixed with hydrochloric acid (a strong acid), phenolphthalein will turn colorless due to the decrease in pH, indicating an acidic solution.
Why does hydrochloric acid change phenolphthalein purple to colorless?
Hydrochloric acid is a strong acid that neutralizes the alkaline properties of phenolphthalein, turning it colorless. This reaction occurs because the acid donates hydrogen ions, causing a shift in the pH balance and resulting in the loss of the pink or purple color in phenolphthalein.
What would happen if I placed a Vial of phenolphthalein into a jar with ammonia?
Nothing will happen... but when you put a drop of the vial in the phenolphthalein, the phenolphthalein will turn into pink... It was just an observation that I saw in our experiment this afternoon
