* Taste: Acids have a sour taste. (Be careful! Never taste an unknown substance, as some acids are dangerous.)
* Reaction with bases: Acids react with bases to form salt and water. This is called neutralization.
* pH: Acids have a pH less than 7. The lower the pH, the stronger the acid.
* Reaction with metals: Many acids react with metals to produce hydrogen gas and a salt.
* Reaction with carbonates: Acids react with carbonates to produce carbon dioxide gas, water, and a salt.
Let me know if you'd like to explore any of these properties in more detail!
