How is phenolphthalein prepared from phenol?

* Phenols are heated with phthalic anhydride and conc. H2SO4 to form phenolphthalein.

What are the reagents required to prepare phenolphthalein?

PHENOLPHTHALEIN INDICATOR, 1% Dissolve 10.0 g of phenolphthalein powder in 750 mL of ethanol and dilute to 1 L with distilled water.

How is phenolphthalein extracted?

At the initial stage, phenol and p-toluenesulfonic acid are easily removed by solving in water. When 2 mol/L NaOH solution is added into the organic layer containing the product and phthalic anhydride, only the product can react with hydroxide to form the red-purple species which dissolves in the aqueous layer.

Which is the correct way to prepare phenolphthalein?

The correct way to prepare a phenolphthalein indicator solution (0.5%) is as follows: Weigh 0.5g Phenolphthalein powder. Add the powder to 50ml 100% (or 95%) Ethanol and stir well. Allow the powder to properly dissolve in Ethanol.

Which is the correct formula for phenolphthalein dye?

Phenolphthalein: Formula, Chemical Structure, Uses, Preparation and Properties The phenolphthalein is an organic dye, which is in turn a weak diprotic acid, used in many volumetric determinations as an acid-base indicator.

How to make phenolphthalein in a stopper bottle?

1. – Weigh out 0.5 g of phenolphthalein. 2. – Prepare a 50% ethanol (ethyl alcohol) solution consisting of 50ml ethanol and 50 ml water. 3. – Dissolve the phenolphthalein thoroughly in the 50% ethanol solution. 4. – Use from a bottle fitted with an eye dropper. Store the rest in a stoppered bottle.

How does phenolphthalein dissolve in aqueous solution?

Note: Phenolphthalein is an organic compound. Therefore, it has a very low solubility in water/ aqueous solutions. However, it dissolves quite well in Ethanol. You might observe a powdery residue if dissolved in 50% Ethanol (… Loading… Weigh 0.5g Phenolphthalein powder. Add the powder to 50ml 100% (or 95%) Ethanol and stir well.