Limestone, acid rain and carbon

i have heard limestone, acid rain, and carbon mentioned together multiple times but I am still confused about how they relate to each other?

hey again :wave: @bella_isaacson !!

so to answer your question, limestone is a very basic (meaning high pH) substance. Acid rain is a very acidic (meaning low pH) substance. One can be used to balance the pH of another and that is how they are mentioned in the practice FRQs !! From what I know, carbon itself doesn’t relate to those concepts BUT Calcium Carbonate (CaCO3) is another name for limestone.

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