How can limestone be dissolved by groundwater when it is almost insoluble in pure water? How does
this happen? What will be an ideal response?
Most groundwater naturally contains some carbonic acid and is slightly acidic. The water becomes
acidic when it combines with carbon dioxide (CO2) from the air or decaying organic matter. The
chemical reaction is H2O + CO2 ? H2CO3.
You might also like to view...
Which of the following statements describes the air motions beneath and between fair-weather cumulus (cumulus humilis) clouds?
A. Downdrafts occur beneath them, and updrafts occur between them. B. Updrafts occur beneath them, and horizontal motions occur between them. C. Downdrafts occur beneath them, and horizontal motions occur between them. D. Updrafts occur beneath them, and downdrafts occur between them.
Sustainable agriculture and organic agriculture are examples of:
A. Alternatives to conventional agricultural practices B. Traditional agricultural practices C. Conventional agricultural practices D. Historic agricultural practices
OPEC plays a leading role in the development of world oil prices.
Answer the following statement true (T) or false (F)
During the early years of Earth, lighter elements such as silicon, magnesium, and aluminum rose to the surface, forming
Earth’s crust.
a. True b. False