Menu /
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.
The term "carbonic acid gas" comes from its relationship with water. When CO2cap C cap O sub 2 dissolves in H2Ocap H sub 2 cap O 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 is a reminder that even the most common
is the Victorian-era name for what we now call carbon dioxide ( CO2cap C cap O sub 2 When he bubbled it through lime water, it
, 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
) . Though the name sounds heavy and acidic, it’s the same invisible gas that makes your soda fizz and helps plants breathe.