Exploring the Role of Phenolphthalein in Chemistry

The video tutorial explains the use of phenolphthalein as an indicator in neutralization reactions. It demonstrates that phenolphthalein is colorless in both neutral and acidic media but turns red in a basic medium. The video also shows how adding hydrochloric acid to a basic medium with phenolphthalein results in a color change back to colorless, illustrating the neutralization process.

What is phenolphthalein primarily used for?

• In neutralization reactions

• In photographic development

• As a food coloring agent

• As a fragrance in perfumes

What is the color of phenolphthalein in a neutral medium?

• Colorless

• Blue

• Green

• Red

What happens to phenolphthalein when sodium hydroxide is added?

• It turns red

• It turns green

• It turns blue

• It remains colorless

What is the color of phenolphthalein in an acidic medium?

• Yellow

• Colorless

• Blue

• Red

What happens when hydrochloric acid is added to phenolphthalein in a basic medium?

• It turns colorless

• It remains red

• It turns blue

• It turns yellow

What is the final observation when phenolphthalein is added to both acidic and neutral media?

• It remains colorless in both

• It turns blue in both

• It turns red in both

• It turns green in both

What is the overall conclusion about phenolphthalein indicator from the experiment?

• It is colorless in basic medium and red in acidic medium

• It is colorless in acidic and neutral media but turns red in basic medium

• It turns blue in acidic medium and red in basic medium

• It is red in all media