Acids and bases are both solutions that react with water. But acids and bases are not alike. Acids contain hydrogen ions, which are positively charged particles. Bases contain hydroxide ions, which are negatively charged particles.

Acids and bases can combine to form a salt and water.

Acids react with metals by losing hydrogen ions in the form of hydrogen gas, which then forms bubbles on the surface of the metal. The reaction between acids and metals is exothermic, meaning that it gives off heat. This property is used in car battery terminals as an indicator of electrical current flow by making them fizz when touched by your tongue!

Bases react with metals by gaining hydroxide ions from hydroxide solutions like lye or baking soda (sodium hydroxide). The reaction between bases and metals is endothermic, meaning that it absorbs heat from its surroundings.

Last modified: October 11, 2022