Acid-Base Indicators and Titration

The video tutorial demonstrates the use of acid-base indicators, specifically methyl orange and phenolphthalein, to observe color changes in acidic and alkaline solutions. The instructor explains the importance of adding drops slowly and swirling the solution during titration to achieve accurate results. The video emphasizes the need to identify the equilibrium color, which is orange for methyl orange, and provides tips for observing these changes effectively. The tutorial concludes with a call to action for viewers to subscribe, donate, and engage with the content.

What are the two chemicals used in the experiment?

• Hydrochloric acid and sodium hydroxide

• Sulfuric acid and potassium hydroxide

• Acetic acid and ammonium hydroxide

• Nitric acid and calcium hydroxide

What color does Methyl Orange turn in an acidic solution?

• Green

• Yellow

• Blue

• Red

What color does Methyl Orange turn in an alkaline solution?

• Red

• Blue

• Yellow

• Green

What color does Phenolphthalein turn in an alkaline solution?

• Red

• Clear

• Pink

• Yellow

What color does Phenolphthalein turn in an acidic solution?

• Pink

• Yellow

• Clear

• Red

During titration, what should you do after adding each drop?

• Swirl the solution

• Heat the solution

• Add another drop immediately

• Wait for 5 minutes

What is the purpose of swirling the solution during titration?

• To change the color faster

• To cool down the solution

• To evaporate excess liquid

• To mix the solution thoroughly

What color indicates the equilibrium between acidic and alkaline solutions when using Methyl Orange?

• Red

• Yellow

• Green

• Orange

What should you have by the side to help see the color change during titration?

• A reference sample

• A thermometer

• A pH meter

• A stopwatch

What is the final color of the solution when Methyl Orange is in an alkaline environment?

• Blue

• Green

• Red

• Yellow