Chemistry Acid Base Salts Part 2 (Acid & Bases) Class 7 VII

TL;DR

Acids taste sour, bases taste bitter and are soapy in touch; both play important roles in our bodies.

Transcript

hello friends this video on acids bases and salts part 2 is brought to you by example.com no more fear from exam so let us now see what are acids now the word acid is derived from a latin word called acid which means sar now does that imply that acids are those substances which are sour in taste well to some extent so these acids they taste sour so... Read More

Key Insights

• 👅 Acids are characterized by their sour taste, while bases are bitter and have a soapy touch.
• 🧡 Acids, such as citric acid and acetic acid, are found in common substances like lemon, orange, and vinegar.
• 😋 Bases, such as lactic acid and baking soda, can be tasted in food items like curd and certain dishes.
• ❓ Our body's proteins are composed of amino acids, which are acids themselves.
• 🦻 The presence of hydrochloric acid in the stomach aids in protein digestion through the activation of pepsin.
• 😌 Excessive acid in the stomach leads to acidity, which can be relieved by antacid tablets, which are bases.
• ❓ Bases neutralize acids and can be distinguished by their ability to reduce acidity.

Questions & Answers

Q: How can acids be identified besides by taste?

Acids can be identified by other properties such as their ability to break down proteins and the presence of hydrogen ions (H+).

Q: How do bases neutralize the acidity in the stomach?

Bases, like antacid tablets, reduce acidity in the stomach by neutralizing the effect of the excess hydrochloric acid (HCl).

Q: Can substances exist that are neither acidic nor basic?

Yes, substances that are neither acidic nor basic are considered neutral, such as sugar and salt water.

Q: What is the role of the enzyme pepsin in the stomach?

Pepsin is activated by the acidic environment in the stomach, and it aids in the digestion of proteins.

Summary & Key Takeaways

• Acids, such as citric acid found in lemons and oranges, taste sour.

• Bases, like lactic acid found in curd and baking soda, taste bitter and feel soapy in touch.

• Proteins in our body contain amino acids, which are acids themselves.