A substance, mostly liquid that donates a proton or accepts an electron pair in reactions. An acid increases the concentration of H+ ions. A base is a substance that releases hydroxide (OH-) ions in aqueous solution, donates electrons and accepts protons

Acids vs Bases
Acids and bases are two important types of substances in chemistry that have distinct properties. Here are the key differences between acids and bases:

1. Definition:
- Acids are substances that donate protons (H+) in a chemical reaction.
- Bases are substances that accept protons or donate hydroxide ions (OH-) in a chemical reaction.

2. pH Scale:
- Acids have a pH below 7, with stronger acids having lower pH values.
- Bases have a pH above 7, with stronger bases having higher pH values.

3. Chemical Properties:
- Acids react with metals to form salts and hydrogen gas.
- Bases react with acids to form salts and water.

4. Taste and Feel:
- Acids have a sour taste, such as in citrus fruits like lemons and oranges.
- Bases have a bitter taste, such as in soap or baking soda.
- Bases also have a slippery or soapy feel.

5. Indicators:
- Acids turn blue litmus paper red.
- Bases turn red litmus paper blue.

6. Examples:
- Common examples of acids include hydrochloric acid (HCl) and sulfuric acid (H2SO4).
- Common examples of bases include sodium hydroxide (NaOH) and ammonia (NH3).
In conclusion, acids and bases have distinct properties that differentiate them from each other. Understanding these differences is crucial in various chemical reactions and applications in the field of chemistry.