Calculate the amount of pure CaCO 3 that could theoretically neutralize the H + ions in a year’s worth of acid rain if a 1-ha site received 500 mm of rain per year and the average pH of the rain was...

Calculate the amount of pure CaCO₃
that could theoretically neutralize the H⁺
ions in a year’s worth of acid rain if a 1-ha site received 500 mm of rain per year and the average pH of the rain was 4.0.

Describe the role of aluminum and its associated ions in soil acidity. Identify the ionic species involved and the effect of these species on the CEC of soils.