Carbonic Acid Gas Direct

, it creates a very weak acid called . This is what gives sparkling water that slight, refreshing "bite" on the tongue. Without the gas, the water tastes flat; with it, it becomes chemically active. 3. The Cycle

Here is a brief look at the life of this "ghostly" substance: 1. The Discovery carbonic acid gas

In the 1750s, a Scottish chemist named called it "fixed air." He realized it was heavier than normal air and could extinguish a flame. When he bubbled it through lime water, it turned the liquid milky—a classic chemistry trick still used today to prove CO2cap C cap O sub 2 is present. 2. The Name , it creates a very weak acid called

is a reminder that even the most common substances have a long history of scientific mystery and a vital role in keeping the planet spinning. When he bubbled it through lime water, it