Human industries and agriculture produce carbon dioxide (CO2) gas that enters the atmosphere. About a quarter of the CO2 is absorbed by
earth's ocean. Once the CO2 dissolved in the seawater, it can react with
water (H20) to produce carbonic acid (H2CO3). The data table lists some
of the properties of CO2, H20 and H2CO3. Based on the chemical
equation and data table, provide two pieces of evidence that suggest a
chemical change is occurring between dissolved CO2 and H2O in the
oceans.
CO2 + H2O → H2CO3
Properties of Compounds
Water (H20)
Carbon Dioxide
(CO2)
Carbonic Acid
(H2CO3)
Density
0.00198g/cm3
1.000g/cm3
2.54g/cm3
0°C
856°C
-56.6°C
Melting
Point
100°C
Not applicable
Boiling Point
-78.5°C (sublimes)
Soluble in water
Solubility
Soluble in water
Not
applicable