Here's a breakdown:
* Arrhenius's Theory: In the late 19th century, Arrhenius proposed that acids produce hydrogen ions (H+) when dissolved in water, while bases produce hydroxide ions (OH-).
* Conductivity Experiments: He conducted experiments measuring the electrical conductivity of different solutions. He observed that solutions of acids and bases conducted electricity much better than pure water, indicating the presence of charged particles.
* Key Insight: Arrhenius's work revolutionized the understanding of acids and bases. He established that the conductivity of solutions was directly related to the presence of ions, and that the hydrogen ions were the key to acidic properties.
Note: While Arrhenius's theory was groundbreaking, it has been expanded upon and refined over time. The modern understanding of acids and bases incorporates concepts from Brønsted-Lowry and Lewis theories, but Arrhenius's foundational work using conductivity remains significant.
