Acids:
* Release hydrogen ions (H+) in solution: Acids are substances that increase the concentration of hydrogen ions (H+) when dissolved in water.
* Examples: Hydrochloric acid (HCl), sulfuric acid (H₂SO₄), citric acid (found in citrus fruits).
Bases:
* Release hydroxide ions (OH-) in solution: Bases are substances that increase the concentration of hydroxide ions (OH-) when dissolved in water.
* Examples: Sodium hydroxide (NaOH), potassium hydroxide (KOH), ammonia (NH₃).
The Relationship:
* Neutralization: When an acid and a base react, they neutralize each other. This reaction forms water (H₂O) and a salt.
* Equation: Acid (H+) + Base (OH-) → Water (H₂O) + Salt
* pH Scale: The concentration of hydrogen ions and hydroxide ions determines the pH of a solution.
* Acidic Solutions: Have a higher concentration of H+ ions, resulting in a pH below 7.
* Basic Solutions: Have a higher concentration of OH- ions, resulting in a pH above 7.
* Neutral Solutions: Have equal concentrations of H+ and OH- ions, resulting in a pH of 7.
In Summary:
Hydroxide ions (OH-) are characteristic of bases, while hydrogen ions (H+) are characteristic of acids. Their interaction leads to neutralization reactions and determines the pH of a solution.
