What equilibrium reaction forms carbonic acid (H2CO3) when carbon dioxide (CO2) dissolves in water (H2O)?
Answer
CO2 + H2O <=> H2CO3
The formation of carbonic acid from dissolved carbon dioxide and water is explicitly described as an equilibrium reaction. This means the process is reversible, as indicated by the double arrow in the chemical representation. When carbon dioxide gas is forced into water under pressure, this equation shifts to the right, creating a measurable concentration of carbonic acid ($ ext{H}_2 ext{CO}_3$). Conversely, when pressure is released, the equilibrium shifts back to the left, causing the dissolved $ ext{CO}_2$ to escape as bubbles. The use of a single arrow, implying irreversible conversion, or incorrect reactants/products would fail to capture the dynamic chemical state described for carbonation.
Related Questions
What equilibrium reaction forms carbonic acid (H2CO3) when carbon dioxide (CO2) dissolves in water (H2O)?Which beverage type is characterized by containing carbonic acid as the only acid component, without added flavorings or preservatives?What happens to the concentration of carbonic acid when the pressure drops after opening a sealed, pressurized carbonated beverage container?In the comparison table, which acid, frequently found in colas, is listed as significantly stronger than carbonic acid ($ ext{H}_2 ext{CO}_3$)?What is the primary function ascribed to carbonic acid ($ ext{H}_2 ext{CO}_3$) regarding the drinking experience, distinct from the flavor roles of stronger acids?If using a home carbonation system, what is the most effective action recommended to maximize the creation of stable carbonic acid in the water?How is carbonic acid formed in naturally sparkling or spontaneously carbonated mineral waters?Which characteristic makes carbonic acid generally considered a minimal long-term dental health concern when consuming plain carbonated water?What term is used to describe carbonic acid ($ ext{H}_2 ext{CO}_3$) in terms of its general strength when compared to acids like Citric Acid or Phosphoric Acid?For anyone using a home carbonation system, why does injecting $ ext{CO}_2$ into room-temperature water result in a weak, short-lived fizz?