. HN For the following reaction in aqueous solution, identify the conjugate acid-base
pairs:
HS (aq) + HF(aq)
F(aq) + H2S(aq)
Solution:

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)