Question

compare the properties of acids and alkalis and prepare a note​

Answer 1

Explanation:

Properties of acids

1. They are liquids.

2. They are solutions of compounds in water.

3. If concentrated they can be corrosive.

4. Acids taste sour (for example, vinegar).

5. Turn blue litmus paper red - this is an easy test for an acid!

6. Usually react with metals to form salts.

7. Acids contain hydrogen ions.

8. Turn Universal Indicator from green to red, and have a pH less than 7.

Properties of alkalis

1. They feel soapy to touch.

2. They are soluble bases.

3. Like acids, they can burn the skin.

4. They turn red litmus blue - this is how you test for an alkali!

5. Alkalis contain hydroxide ions (OH-).

6. They taste bitter.

7. Turns Universal Indicator from green to blue or purple.

Answer 2

Comparison of the properties of acids and alkali is as follows:

Acids-

• Acides are sour in taste.
• The color of certain acid-base can be changed by acids.
• It contains lots of hydrogen ions, symbol H+.

Alkalis-

• Alkalis are better in taste.
• Red litmus paper can change colour by alkalis.
• It has lots of hydroxide ions, which have the symbol OH-.