Which statement best describes the difference between a substance with a pH of 2.0 versus a substance with a pH of 4.0?

in theory, limestone is composed principally of the compound calcium carbonate - caco3, but in reality this compound is deposited in conditions involving a number of other compounds as impurities so it ends up being a mixture of many compounds.

hope this : -)

tony (lordcaos066)

the answer would be b i believe