Class 7 Exam > Class 7 Videos > Science Olympiad Class 7 > Explanation: Acids, Bases & Salts
Explanation: Acids, Bases & Salts Video Lecture | Science Olympiad Class 7
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FAQs on Explanation: Acids, Bases & Salts Video Lecture - Science Olympiad Class 7
| 1. What are acids, bases, and salts? |  |
Ans. Acids, bases, and salts are three types of chemical substances. Acids are sour in taste, turn blue litmus paper red, and have a pH value less than 7. Bases are bitter in taste, turn red litmus paper blue, and have a pH value greater than 7. Salts are formed when an acid reacts with a base, and they have a neutral pH value of 7.
| 2. How do acids and bases react with each other? | |
Ans. Acids and bases react with each other to form salts and water in a process called neutralization. During neutralization, the hydrogen ions (H+) from the acid combine with the hydroxide ions (OH-) from the base to form water. The remaining ions combine to form a salt.
| 3. What are some common examples of acids, bases, and salts? | |
Ans. Some common examples of acids include vinegar (acetic acid), lemon juice (citric acid), and hydrochloric acid. Examples of bases include baking soda (sodium bicarbonate), soap, and ammonia. Common salts include table salt (sodium chloride), Epsom salt (magnesium sulfate), and baking powder (a mixture of various salts).
| 4. How do acids, bases, and salts impact our daily lives? | |
Ans. Acids, bases, and salts have various applications in our daily lives. Acids like vinegar are used for cooking and cleaning, while bases like soap are used for personal hygiene. Salts are essential for food preservation and flavoring. Additionally, acids, bases, and salts play crucial roles in industries such as agriculture, medicine, and manufacturing.
| 5. How can the pH of a substance be determined? | |
Ans. The pH of a substance can be determined using pH indicators or pH meters. pH indicators are substances that change color depending on the acidity or basicity of a solution. They can be in the form of paper strips or liquid solutions. pH meters are electronic devices that provide a numerical value for the pH of a substance by measuring the concentration of hydrogen ions in the solution.
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Nov 21, 2024 Last updated |
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