Ground water contaminated with acid rain percolates through a limestone aquifer.With longer residence time in the aquifer system,

Question

Quizplus · Accepted Answer

Limestone is a sedimentary rock composed mainly of calcium carbonate, which can neutralize the acidity in the groundwater. As the water flows through the limestone, it will dissolve some of the rock, increasing the dissolved bicarbonate concentration. Sulfate and nitrate are not directly affected by the limestone and may remain in the water or even decrease as they are adsorbed onto the limestone surface. Therefore, option C is the correct choice.

Ground Water Contaminated with Acid Rain Percolates Through a Limestone