Acid Reactions: To test acid reaction we use a dilute solution of hydrochloric acid (10% or less). ... The other caution is, many rocks are contaminated with lime, especially clastic rocks, and they may react vigorously anyway. You will have to observe carefully to separate limy clastics from carbonates.

Do sedimentary rocks react with acid?

Some sedimentary rocks are bound together with calcite or dolomite cement. Sandstone, siltstone, and conglomerate sometimes have calcite cement that will produce a vigorous fizz with cold hydrochloric acid. Some conglomerates and breccias contain clasts of carbonate rocks or minerals that react with acid.

Does acid react with rock?

When carbonic acid flows through the cracks of some rocks, it chemically reacts with the rock causing some of it to dissolve. Carbonic acid is especially reactive with calcite, which is the main mineral that makes up limestone.