- Sour taste: Arrhenius acids have a sour taste, such as the taste of lemon juice or vinegar.
- React with metals: Arrhenius acids react with metals to produce hydrogen gas. For example, when hydrochloric acid (HCl) is added to iron (Fe), it produces hydrogen gas (H2) and iron(II) chloride (FeCl2).
- React with bases: Arrhenius acids react with bases to produce salt and water. For example, when hydrochloric acid (HCl) is added to sodium hydroxide (NaOH), it produces sodium chloride (NaCl) and water (H2O).
- Change the color of indicators: Arrhenius acids change the color of certain indicators, such as litmus paper or phenolphthalein. For example, litmus paper turns red when it is dipped in an acidic solution.
- Electrical conductivity: Arrhenius acids conduct electricity when dissolved in water. This is because the H+ ions that are released by the acid can move freely in the water, carrying an electrical charge.
It's important to note that Arrhenius acids are an older concept in chemistry. Modern theories of acids and bases (such as the Bronsted-Lowry theory or the Lewis theory) provide a more complete understanding of acidic behavior beyond the concept of hydrogen ion release.
