Key Points:
* pH Scale: Acidity is measured on a pH scale, which ranges from 0 to 14. A pH of 7 is neutral (like pure water). Lower pH values (below 7) indicate higher acidity.
* Hydrogen Ions (H+): The more hydrogen ions a substance has, the more acidic it is.
* Sour Taste: Acids typically have a sour taste.
* Reactions with Bases: Acids react with bases (alkaline substances) to neutralize each other, forming salt and water.
Examples of Acidic Substances:
* Lemon Juice: Contains citric acid.
* Vinegar: Contains acetic acid.
* Stomach Acid: Contains hydrochloric acid.
* Battery Acid: Contains sulfuric acid.
Important Note: Strong acids are very corrosive and can be dangerous. Always handle acids with caution and proper safety measures.
