Acid is sourto taste like an ex lemon orange
basic is bitter to taste like an ex vinger.

Bases and acids are two types of compounds that have distinct properties and behaviors.

Acids:
- Acids are substances that release hydrogen ions (H+) when dissolved in water.
- They have a sour taste and can cause a burning sensation.
- Acids turn blue litmus paper red and have a pH value below 7.
- Examples of acids include hydrochloric acid (HCl) and sulfuric acid (H2SO4).

Bases:
- Bases are substances that release hydroxide ions (OH-) when dissolved in water.
- They have a bitter taste and feel slippery.
- Bases turn red litmus paper blue and have a pH value above 7.
- Examples of bases include sodium hydroxide (NaOH) and ammonia (NH3).

Important Points about Acids and Bases (Chapter 5):
1. Acids and bases are often referred to as the two extremes of the pH scale.
2. The pH scale measures the concentration of hydrogen ions in a solution and ranges from 0 to 14.
3. A pH of 7 is considered neutral, while lower values indicate acidity and higher values indicate alkalinity.
4. Acids and bases can react with each other to form water and a salt in a process called neutralization.
5. The strength of an acid or base is determined by its ability to ionize or dissociate in water.
6. Acids and bases have various uses in everyday life, such as in cleaning products, food preservation, and medicine.
7. Acid rain, which is caused by the emissions of sulfur dioxide and nitrogen oxides, can have harmful effects on the environment.
8. The concept of acids and bases has evolved over time, with different theories proposed to explain their behavior, including the Arrhenius, Brønsted-Lowry, and Lewis theories.