How to Identify Acids, Bases, and Neutrals

TL;DR

Identify acids, bases, and neutral solutions by using indicators like litmus paper and turmeric. Blue litmus remains blue for basic or neutral solutions, while turmeric indicates a basic solution with a dark red colour change. Taste can also help determine the nature of drinks.

Transcript

hello friends this video on acids bases and salts part 12 is brought to you by exam clear calm no more fear from exam question number 6 Dorji had a few bottles of soft drink in his restaurant but unfortunately these are not labeled he has to serve the drinks on the demand of customers one customer wants ascetic drink another ones face it and the th... Read More

Key Insights

• 😐 Litmus paper and taste can be used to determine the nature of acids, bases, and neutral solutions.
• 😪 Turmeric indicator turns dark red in a basic solution, yellow in an acidic solution, and shows no change in a sugar solution.
• 🏮 Blue litmus paper remaining blue indicates the solution is basic or neutral. A red litmus paper is used to differentiate between them.

Questions & Answers

Q: How can Dorji determine which soft drink is acid, base, or neutral?

Dorji can use litmus paper and taste to serve the customers. If blue litmus turns red, the drink is acidic. If red litmus turns blue, the drink is basic. If there is no change, the drink is neutral. Taste can also help identify acid (sour) and base (bitter) drinks.

Q: How can you identify hydrochloric acid, sodium hydroxide, and sugar solution using turmeric indicator?

By placing turmeric paper in each solution, you can determine their nature. Turmeric turns dark red in the basic solution (sodium hydroxide), remains yellow in the acidic solution (hydrochloric acid), and shows no change in color in the sugar solution.

Q: What does it mean when blue litmus paper remains blue in a solution?

If blue litmus paper remains blue, it indicates that the solution is either basic or neutral. To differentiate between these, a red litmus paper is used. If it turns blue, it is a basic solution, and if it remains red, it is a neutral solution.

Q: Which statement about indicators and their color changes with acids and bases is correct?

The correct statement is that the change of color in an acid and base depends on the type of indicator used. Different indicators have different reactions, so it is not true that all indicators change color with both acids and bases.

Summary & Key Takeaways

• Dorji needs to serve customers different soft drinks but doesn't know which ones are acid, base, or neutral. He can use litmus paper and taste to determine the nature of the drinks.

• With only turmeric indicator, you can identify a basic solution by observing a color change to dark red. An acidic solution remains yellow, and a sugar solution shows no change in color.

• Blue litmus paper remaining blue indicates the solution is either basic or neutral. To determine if it is basic or neutral, a red litmus paper is used. If it turns blue, the solution is basic.