What happens when sulphuric acid reacts with phenolphthalein?

Explanation: Phenolphthalein is an acid-base indicator that is colorless in acidic solutions and pink in basic solutions. If phenolphthalein is added to the original sample of sulfuric acid, the solution is colorless and will remain so while hydrogen ions are in excess.

What happens when phenolphthalein reacts with sodium hydroxide?

When the sodium hydroxide, which is a base, is mixed with phenolphthalein, it turns pink. To monitor the progress of the chemical reaction, the acid-base indicator phenolphthalein will be used.

What is the indicator used when h2so4 is titrated with Naoh?

The indicator dye used in this experiment is call “bromothymol blue”. Add 3 or 4 drops of bromothymol blue to the acid solution in the 250 mL beaker. The indicator should turn yellow in the acid solution.

What is the colour of phenolphthalein in sodium hydroxide solution?

pink
It is colourless below pH 8.5 i.e. in acidic solutions and attains a pink to deep red hue above pH 9.0 i.e. in basic solutions. Therefore, when phenolphthalein is added to caustic soda which is a strong base, it turns pink in colour.

What color does h2so4 give with phenolphthalein?

Phenolphthalein ion in concentrated sulfuric acid is orange red due to sulfonation.

Is phenolphthalein an indicator?

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.

What colour change would you see if you added nitric acid to sodium hydroxide and phenolphthalein?

A commonly used indicator for strong acid-strong base titrations is phenolphthalein. Solutions in which a few drops of phenolphthalein have been added turn from colorless to brilliant pink as the solution turns from acidic to basic.

Why does phenolphthalein turn pink in sodium hydroxide?

Explanation: When the sodium hydroxide, which is a base, is mixed with phenolphthalein, it turns pink. When the base is neutralized by the acid, citric acid, which is present in lemons, the pink solution turns colorless.

What type of indicator is phenolphthalein?

acid-base indicator
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 pink in basic medium?

It is a weak acid, which can lose H+ ions in solution. The phenolphthalein molecule is colorless, and the phenolphthalein ion is pink. When a base is added to the phenolphthalein,the molecule-ions in equilibrium shifts to the right, leading to more ionization as H+ ions are removed. Was this answer helpful?

Why is phenolphthalein used in the titration of sodium hydroxide?

In this particular experiment, sodium hydroxide is titrated with sulfuric acid, and then an indicator, Phenolphthalein is used to determine the end point of the titration, when the chemical reaction between the two solutions is complete. The indicator usually changes colors at different pH values.

Which indicator is used in titration of sodium hydroxide and sulfuric acid?

In this experiment involving a reaction between sodium hydroxide (titrant) and sulfuric acid (titer), an indicator called phenolphthalein is used. It is colorless in acids, and its endpoint is marked by a color change to pink, when the entire volume of the analyte has reacted with a small amount of the titrant.

How to prepare phenolphthalein indicator from H2SO4?

Draw 10 ml dilute H 2 SO 4 by a pipette, and release it into a 250 ml flask. 5. Add 2 – 3 drops of phenolphthalein indicator to the acid, and keep the flask just below the burette stopcock on a white paper. 6.

How do you make phenolphthalein from sulfuric acid?

procedure Pipette aliquot of sulfuric acid solution into 250mL Erlenmeyer flask. Dilute with distilled water to about 100 mL. Add 2-3 drops of phenolphthalein solution. Titrate with NaOH solution till the first color change.