Litmus Paper Test:

Acid:- If you dip a blue litmus paper into an acid, it will turn red while a red litmus paper will not change colour.

Base:- Bases turn red litmus paper blue while the blue litmus paper stays blue.

Characteristic of pH scale are

  • (i) For acidic solution, pH < 7
  • (ii) For alkaline solution, pH > 7
  • (iii) For neutral solution, pH = 7

Neutralization

Acids and bases react with one another to yield two products: water, and an ionic compound known as a salt. This kind of reaction is called a neutralization reaction.

HCl_NaOH.png

Alkali: A base which is soluble in water is called alkali.

Point to Remember: All alkalis are bases, but all bases are not alkalis.

Uses of Acids

AcidsUse
1. Acetic acid
2. Citric acid
3. Tartaric acid
4. Oxalic acid
5. Carbonic acid
6. Boric acid
Cooking
Food preservation; soft drinks
Baking powder
Ink stain remover
Soft drinks
Washing eyes
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