Chapter 10, Problem 10.111CP

One of the most acidic lakes in the United States is Little Echo Pond in the Adirondacks in New York. Recently, this lake had a pH of 4.2, well below the recommended pH of 6.5. (10.6, 10.7)

A helicopter drops calcium carbonate on an acidic lake to increase its pH.
a. What are the [H₃0 ] and [OH of Little Echo Pond?
b. What are the [H₃O ] and [OH j of a lake that has a pH of 6.5?
c. One way to raise the pH (and restore aquatic life) is to add limestone (CaCO₃). How many grams of CaCO₃ are needed to neutralize 1.0 kL of the acidic water from Little Echo Pond if the acid is sulfuric acid?
H₂S0₄(aq) + CaCO₃(s) - CO₂ (g) +H₂O(1) + CaSO₄ (aq)