Forest soils tend to be somewhat acidic. this acidity can be increased with acid rain. which ion is typically present in soil with a high acidity? a. phosphate b. bicarbonate c. sulfate d. calcium

I would go with C. Sulfate

The right answer is C. Sulfate

Acid sulfate soil are soils characteristic of certain tannins, characterized by high sulphate levels and high acidity.

Crops are more difficult, and these soils are often more vulnerable to erosion, degradation and salinization.

They are also more vulnerable than soils basic to many pollutions (by heavy metals for example, which are more mobile and bioassimilable in an acid substrate).

The answer is C

groundwater is contained and flows through bodies of rock and sediment called aquifers. The amount of time that groundwater remains in aquifers is called its residence time, which can vary widely, from a few days or weeks to 10 thousand years or more.