Question

What happens when carbonic acid and lime water are mixed?

Answer 1

Answer:

The molecules of carbon dioxide reacted with the water, forming carbonic acid, and changed the color of the indicator. Tell students that they have seen carbon dioxide gas from your breath and carbon dioxide gas from carbonated water turn an indicator solution acidic.

Answer 2

Carbon dioxide dissolves in water and slowly reacts with water to produce carbonic acid. The cloudy white solution observed when CO2 is bubbled into limewater results from a reaction between Ca(OH)2 and either CO2 or H2CO3 to form an insoluble calcium carbonate precipitate.