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Overview: Acids and Bases Video Lecture - Class 10
FAQs on Overview: Acids and Bases Video Lecture - Class 10
| 1. What are acids and bases? |  |
Ans. Acids and bases are two types of chemical substances that have different properties. Acids are substances that have a sour taste and can dissolve metals. Bases, on the other hand, have a bitter taste and can be soapy to touch. Both of these substances have the ability to react with each other and neutralize the effect.
| 2. What is the pH scale? | |
Ans. The pH scale is a measure of acidity or basicity of a solution. The scale ranges from 0 to 14, where 0 indicates highly acidic and 14 indicates highly basic. A pH of 7 is considered neutral. The pH scale is used to determine the acidity or basicity of solutions in various industries, including food, medicine, and chemistry.
| 3. How are acids and bases used in everyday life? | |
Ans. Acids and bases are used in various ways in our day-to-day life. For instance, acids such as vinegar and lemon juice are used in cooking to add flavor and tenderize meat. Bases such as baking soda and toothpaste are used for cleaning purposes. Another example is the use of antacids that contain bases to neutralize the excess stomach acid.
| 4. What is the difference between a strong and weak acid? | |
Ans. A strong acid is an acid that fully dissociates in an aqueous solution, releasing all its H+ ions. A weak acid, on the other hand, only partially dissociates in an aqueous solution, releasing only a few of its H+ ions. As a result, strong acids have a lower pH value compared to weak acids.
| 5. What happens when an acid and a base react? | |
Ans. When an acid and a base react, they undergo a neutralization reaction, which results in the formation of salt and water. During this reaction, the H+ ions of the acid react with the OH- ions of the base to form water, while the remaining ions combine to form a salt. The pH of the resulting solution is neutral, i.e., 7.
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